September 2026:
very warm with below average rainfall
Posted
at 13:30 on 1st October 2026
September 2026 was very warm (the second warmest this century). Rainfall
was rather below average.
Temperatures:
Highest 24.2°C (25th)
Lowest 10.8°C (23rd)
Average Max 21.7°C (+1.8°C)
Average Min 14.4°C (+2.3°C)
Mean for month 17.7°C
(+1.9°C)
This was the 8th month in a row that
the mean temperature for the month was close to or exceeding 2C above
the 2000-2024 mean. Nights were especially warm,with many nights well
into the high teens °C.
There weren't any particularly hot days, nevertheless the temperature
exceeded 21°C on 21 out of 30 days, the most in any September this
century. Previous best was 2014 with 18 such days.
This was the second warmest September this century, only 2023 with
that ridiculous heatwave was warmer.
The graphs below show the daily maxima, minima and mean temperature
for each day. The green line shows the mean over the preceding 10
days, and the black line shows the 2000-2024 mean over 30 days, with
the date of the line covering 15 days before and 15 days after, and is
a clear indication of where temperatures should be at this time of
year.It is easy to see just how anomalously warm September was with
all three metrics consistently tracking well above normal.
Rainfall
Total for month 37.8mm
(64%)
Wet days (>0.2mm)
12
Wettest day 7th
(16.8mm)
Rainfall year-to-date:
532.6mm (105%)
Around two-thirds of the normal rainfall fell in September - the
year-to-date now running at 105% of normal. One would expect (given El
Nino which tends to promote wet Autumns in north-west Europe) that
rainfall would have started to ramp up a bit more. Daily rain graph
below - red line shows the rolling 30-day rainfall up to the point of
plot; the green line shows the 2000-2024 rolling 30 day mean for
comparison.
oooOOOooo
Graphs
Changes
Posted
at 16:30 on 20th September 2026
For the last 15 years or so, I have been using
Graphweather to produce the static graphs used on this site..
However, this software is no longer being developed or
supported (i.e. "abandonware") and I've been having issues with it
running under Windows 11, so I have been developing a replacement,
which is far more flexible and user-friendly.
This is using recorded data directly from CumulusMX, and
I can use it to provide a variety of bespoke graphs with the ability
to include long term/climatic data I have since 2000. This also allows
a fallback should I need to replace my weather station in the future,
and I won't be tied to Davis products going forward.
The new graphing system is now ready and the replacement graphs are
now on the site. I have renamed the "Legacy graphs" tab to "Static
Graphs", to distinguish them from the interactive but somewhat limited
graphs elsewhere on this site.
The links to the new graphs now open in a new tab, as I
think they look better like that instead of being squeezed into the
right hand half of the screen.
The new graphs basically replicate the old Graphweather ones, except
that the monthly graphs also include long-term mean data.The
temperature graph below, for example, is from August this year.
As with the old graphs, there are the daily maxima/minima - the
additional data is the 10-day rolling mean temperature (green line),
and the long-term (2000-2024) rolling 30-day mean centred on each
date, so for each day, the mean is for 15 days before and 15 days
after. It's easy to see that August was a lot warmer than average.
I also added coloured lines to show the old 70°F and 80°F marks that I
often speak of (80°F is the heatwave threshold I use.
I will also be adding a couple of new pages of graphs in
due course, one covering data for this year and last year, the other
will have graphs of average temperature and rainfall since 2000.
I'll also be using graphs for the monthly and seasonal
summaries.
oooOOOooo
Summer 2026:
Hottest this century; one to remember!
Posted
at 16:30 on 1st September 2026
For the last 50 years,
many spoke of 1976 as the benchmark for hot summers - I am
plenty old enough to have my own memories of that year.
However, it is safe to say
thay this summer has blown 1976 out of the water both locally and
nationally, with a few places having recorded no rain at
all in 2 months at one stage.
Here are the numbers:
The mean temperature for
Summer 2026 was 20.2°C. This is a truly remarkable figure, given that
only last year was previously the warmest of the century at 18.9°C.
This year has beaten that by 1.3°C, which is a huge margin.
The mean this century for
summer is 17.2°C, so that was beaten by 3 whole °C.
What was also remarkable was
the sheer persistence of the warmth. over the summer as a whole (and I
include the last week of May in this even though it's meterologically
still spring) we had daytime maxima of:-
35 hot (>26.7°C,
the old 80°F) days.
12 days reaching or
exceeding 30°C. A further 6 days exceeded 29.5°C or
greater.
2 days exceeding 32°C
(the old 90°F)
The station temperature record
being broken at 34.5°C in late June.
To put those in context, only
2003 had as many as six days over 30°C, followed by 2020 (4) and 2024 (3)
For "hot" >80°F days, prior
to this year, 2018 led the way with 16 days, followed by 2013 with 13
days. 35 such days is remarkable.
Every day from the 18th June
exceeded 21°C, except 29th August which still managed 19.9 despite an
Atlantic low bringing autumnal wind and rain.
It is easy to forget that the
first 10 days of June were terrible - temperatures well
below average and a month-and a half's rain. We were fortunate that
the late May Bank holiday fell very early (25th) this year;.had it been on
the 31st, half-term week would have been a complete write-off.
Rainfall totalled 118.8mm,
which is 77% of normal for summer here... overall slightly drier than
usual, but that doeeant tell the whole story, of course.
All but 3.6mm of that rain
fell in the first 10 days of June (64.4mm) and in the 2nd half of August
in 2 wet spells of 3 days each.
The middle 9 weeks of the
season was pretty much bone dry as vegetation suffered.
There was not much thunder -
one intense thunderstorm in terms of lightning during the late June
heatwave (but gave very little rain - 1mm - here) and a thundery
shower on August 20th.
oooOOOooo
August
2026: Hottest this century, rainfall average
Posted
at 16:00 on 1st September 2026
Well.. August 2026 was the hottest
this century. The month started on the hot and dry theme that
dominated this summer, but a more changeable second half of the month
resulted with rainfall coming out at exactly average.
Temperatures:
Highest 30.9°C (14th)
Lowest 11.1°C (22nd)
Average Max 25.2°C (+3.6°C)
Average Min 16.7°C (+1.9°C)
Mean for month 21.9°C
(+2.6°C)
This was the hottest
August this century. The mean of 20.3°C exceeded the previous hottest
(2022) which was 20.0°C, and before July, would have been
the hottest month this century (for all months).
It was also the 7th month
in a row to be significantly (2°C+) warmer than usual, only
January this year was close to average in terms of temperature.
There was a further
heatwave (3 ore more days in a row exceeding 26.7°C) to add to
the three previous ones this year.
Daytime warmth was pretty
consistent - the average day maximum for August is 21.6°C,
however only two days failed to reach that mark, one of those being
Saturday 29th which despite the wind, cloud and rain still managed
19.9°C. In a weather setup such that we had on that day in late
August, one would normally expect ahout 16°C or so!
We had nine days exceeding
the old 80°F mark (26.7°C), and the 14th became the twelth day
this year to reach or exceed 30°C. Previously, only 2003 had managed
as many as six.More on that in the Summer summary.
Another stat of interest
is the rolling annual mean temperature.The average is 11.7°C here,
however recent years have clearly trended warmer. Before 2022 no year
had achieved 12.5°C, but now every year since has done so, with the
highest being 12.8°C.
The current rolling annual
mean temperature is currently.... 13.5°C!
Rainfall
Total for month 53.4mm
(100.2%
Wet days (>0.2mm)
5
Wettest day
28th (15.4mm)
Rainfall
year-to-date: 494.8mm (110%)
As previously mentioned,
all the rain came in the 2nd half of the month, being concentrated
into 2 groups of 3 days each about a week apart.One day (20th)
produced thunder as a thundery shower passed through, giving
around 9mm of rain ina 5 minute spell. To put that into context,
that is three times as much rain as fell in over 2 months, between
11th June and 18th August!
The 28th August brought
the first Atlantic low pressure system since the first 10 days of
June.
oooOOOooo
Proper
rain at last! Plus August latest....
Posted
at 10:30 on 19th August 2026
Breaking news.... we have had
some proper rain for the first time in over two months, breaking the
long dry spell.
9.8mm of rain fell since 3am this
morning.
The last time we had more than about
1mm of rain was the 10th June when 6.8mm fell, and 7th June saw
10.6mm.
In that period since 11th June, just
3.4mm fell, with 2 days (16th June and 25th July) seeing 1mm. I cannot
remember such a long period with such minimal rainfall.
I am trying to obtain rainfall numbers
for the summer of 1976, but I do remember an unsettled spell in late
July between the two major heatwaves that occurred that year.
So where are we with temperatures this
August so far? As of 9am this morning, August is running a mean
temperature of 21.5°C and an average maximum of 26.8°C.
The August record mean for this century
is 20.0°C, so we are currently well above that. It remains to be
seen whether we will break that this year - we'd need a mean temp of
18.2c or higher for the remaining days to do so.
It is now certain to be the hottest
summer this century (only a mean of below 10°C for the rest of this
month can stop that. Out of the question!) . Last year holds that
record at 18.9°C.
Currently, this summer stands at 20.4°C
- there is a good chance that we will end up at or above 20°C for the
whole season by the end of this month, which would be
incredible.The rest of August would need to come out at 17.6 for a
mean temperature, which is pretty close to average. Whatever, another
much warmer month than average is almost certain, will be the 7th in a
row with an anomaly of +2°C or greater.
I t does now look like the remaining
days of August will be (at least) rather less settled than we have
been used to, but still with the possibility of some warm days. Model
output is not giving any solid guidance beyond that, so we shall
see...
oooOOOooo
July
2026: Hottest month this century, almost completely dry
Posted
at 10:00 on 1st August 2026
Well.. July 2026 will live long
in the memory, and will no doubt be spoken about in a similar way to
1976 in the years to come.
It came in as the hottest month this
century, and not by a small margin! It was also (almost!) completely
dry, with only a short shower bringing in 1mm preventing a completely
rainless month.
The month was also
extremely sunny. I don't record sunshine here, but subject
to final confirmation, it looks like Bournemouth Hurn Airport may have
broken the national record for sunshine for any month by
about 10 hours, beating Eastbourne's record of 383.9
hours which has stood since July 1911.
*** EDIT
*** added on 4th September - Hurn ended up at 382.6,
however the sunshine recorder widely used back in the day apparently
has a slight bias to over-recording very weak sunshine, si it's quite
possible that if an adjustment for modern methods existed, Hurn
probably exceeded Eastbournes record. However, no adjustment method
exists, so it remains a matter of "close, but no cigar..."
Temperatures:
Highest 31.4°C
(11th and 12th)
Lowest 13.3°C
(2nd)
Average Max 27.3°C
(+5.5°C)
Average Min 16.7°C
(+2.7°C)
Mean for month
21.9°C (+4.0°C)
The July mean maximum
temperature is 21.8°C. Every day this month exceeded that; no day
failed to reach 22°C.
6 days exceeded 30°C, the third
month in a row to exceed that mark. That has not happened before.
16 days exceeded the "hot day" mark
of 26.7°C/ 80°F
25 days exceeded 25°C.. a mark
exceeded just once in the entire summer of 2007.
In terms of night minima, these
averaged the highest of any month this century- the previous
warmest was 16.0°C (July 2018)
This was the hottest month overall
this century - not just beating, but obliterating July
2018 (20.2°C) by 1.7°C (a big margin)
This was also
the sixth month in a row to be significantly warmeer than
average - all six being close to or exceeding a +2°C
anomaly.
This was also, as far as I cen
tell, just the 2nd month this century where this month's mean
(21.9°C) was higher than the monthly average daytime maxima
(21.8°C), the previous example being the ridiculously mild
December 2015.
I have also looked at the rolling
annual mean temperature, in this case 1st August 2025 up to
yesterday.
This rolling annual mean
temperature stands at 13.3°C. Using this same measure, no calendar
year this century reached as high as 12.5°C
until 2022.(The average is 11.8°C)
Every year since has done so,
2022/3/4/5.
The current rolling annual mean
stands at 13.3°C, exceeding the average by 1.5°C, and 2022's
12.8°C by half a degree. These are remarkable numbers when
averaged over a period of that length.
With the seas around the UK being
so warm, it is likely to continue to be significantly warmer than
average in August, and perhaps September as well.
A good example of this was the last
Sunday of the month.
Around 9am, very blustery winds
from just north of west, with a rain shower passing through. I
would expect the temperature at that time of day under those
conditions to be around 14-16c in late July.
Nope. Around 22c, with a drop of a
degree or so as the shower passed through.
Even the last day of the month
peaked at 26.1°C despite northwesterly winds behind a clearing
(weak) cold front.
Rainfall:
Total rain 1.0mm (1.9%)
..All of which fell at breakfast
time on the 26th. Many places locally missed this rain and will
have recorded an entirely rainless month.
Not quite a record here, as
July 2018 recorded 0.8mm.
The year-to-date rainfall stands at
441.4mm (111.4%), still above average, thanks mainly to a very
wet first seven weeks of the year.
oooOOOooo
Heatwave
No.3 in numbers: Longest heatwave this century
Posted
at 10:30 on 19th July 2026
Well.. as everyone is in no
doubt aware, we have been in the grip of a prolonged heatwave -
the third this summer, and the longest since the famous summer of
1976
It now looks like that
heatwave came to an end yesterday, with today's high
looking like 26.2°C
In this post, I will look at what I
consider contitutes a heatwave, look back at previous heatwaves this
century, and look at the numbers behind this one.
So.. what constitutes a
heatwave?
The Met Office defines a heatwave as
three successive days where the temperature reaches or exceeced a
certain threshold. That threshold varies depending on where in the
country you are; a hot day in Scotland, for example, would not be
considered hot in London, as London is warmer in general.
In a previous post, I mentioned that
I regard a "hot day" here at reaching or exceeding the old 80°
Fahrenheit, which is 26.7°C. Therefore, what constitutes a heatwave
here, in my book, is three or more successive days where the
temperature reaches or exceeds 80°F / 26.7°C.
I went back through my records to
look at previous heatwaves where that condition was met.
The table below shows the dates, with
the daytime maximum temperatures during each run:
2003 4-Aug to 7-Aug
28.3
30.5
33.3
32.8
*
2003 9-Aug to 12-Aug
29.2
32.7
30.1
32.5
2006 2-Jul to 4-Jul
29.4
29.3
26.8
2006 16-Jul to 19-Jul
27.1
28.7
30.4
30.7
2013 07-Jul to 10-Jul
27.6
28.7
27.8
27.8
2013 13-Jul to 15-Jul
28.2
27.8
27.3
*
2013 17-Jul to 21-Jul
27.1
29.1
28.6
27.1
27.6
2014 22-Jul to 26-Jul
28.9
28.2
29.9
28.2
29.3
2017 19-Jul to 21 Jul
28.8
30
27.6
2018 28-Jun to 02-Jul
28.5
28.5
27.8
28.7
31.2
2018 06-Jul to 08-Jul
28.6
28.2
28.9
2018 24-Jul to 26-Jul
27.2
27.7
26.7
2020 07-Aug to 09-Aug
29.6
31.3
30.2
2020 11-Aug to 13-Aug
30.2
30.2
28.3
2021 16-Jul to 22-Jul
27.1
28.1
28.3
28.7
28.6
27.8
27.1
2022 10-Aug to 14-Aug
29
31.2
31.3
29.9
29.2
2023 03-Sep to 09-Sep
26.9
27.9
28.1
27.3
28.4
26.9
28.9
2024 30-Jul to 01-Aug
30.3
30.4
30.5
2026 24-May to 27-May
28.1
30.4
28.7
29.7
2026 21-Jun to 26-Jun
27.8
31.2
29.6
33.6
34.5
26.8
2026 06-Jul to 17-Jul
29.6
30.9
30.2
30.1
29.9
31.4
30.9
29.8
28.9
30.2
29.1
28.1
It is true to say one can do anything
with statistics... however I have picked out some numbers from the
list of heatwaves and how they compare to this last one.
This heatwave lasted 12 days, and
each day exceeded the "heatwave threshold" by between 2 and nearly
5°C
In 2003 and 2013 we came close
to having nine-day heatwaves, with one day below 26.7°C (marked with
an asterisk) breaking the runs on each occasion.
Another thing to note is that if one
considers those pairs as one, we have has 19 heatwaves this century.
In the first 13 years, we had only
three.and a run of six summers 2007-12 without a single one.
In the 13 years following, there have
been sixteen.
The three in 2013 all came within a
15-day spell, so that is probably the closest comparison with July
2026, however, look at the maxima during the two periods.
2013 managed one day over 29°C, this
last spell had only two days out of the 12 NOT to reach 29°C, and
six days exceeded 30°C.
12 days in total have reached or
exceeded 30°C in 2026, twice the number of 2003 which is next on the
list of 30°C+ days with 6.
This year has also seen 22 "hot" days
at or above the 26.7°C mark.. six more than the nearest challenger
of 2018.
And it's still only just past
mid-July!
The 4-week period between 21st June
and 19th July was particuklarly remarkable. That encompassed
Heatwaves 2 and 3 and the less hot period in between.
The mean temperature between those
dates, this century is 18.4°C.
This year, the mean was a staggering
23.0°C (+4.6) and a mean maximum of 28.3°C. The nearest
challenger is 2018 with a mean of 19.9°C cflosely followed by 2025's
19.8°C
We do look to be at the start of a
protracted less-hot peiod now - as it stands, it could well be much
cooler and unsettled by next weekend 25th/26th.. (yeah, I know, just
as the kids break up from school!), but that is a week away and time
will tell if this more unsettled signal "sticks" and whether it will
be for an extended period or not.
I remember 1976, and the August that
followed was fine, warm and rainless (until the Bank Holiday!) with
another heatwave part-way through, following the hot July.. however
I also remember the hot Julys of 2006 and 2018 were followed by
rather disappointing Augusts. We shall see!
oooOOOooo
June 2026: Cool,
wet start, historic heatwave to end...
Posted
at 09:15 on 3rd July 2026
June 2026 was a remarkable
month, it began with a cool and very wet first 11 days, then a
recovery to very dry with average temperatures, followed by
a remarkable and record breaking heatwave during the last 10
days.
Temperatures:
Highest 34.5°C (25th)
Lowest 10.1°C (9th)
Average Max 22.2°C (+2.0°C)
Average Min 15.2°C (+2.7°C)
Mean for month 18.3°C (+2.1°C)
This was the
2nd warmest June this century, only 2023 was warmer
(18.7°C)
This was also
the fifth month in a row to be significantly warmeer than
average - all five being close to or exceeding a +2°C
anomaly.
The month had a cool start, and a
very hot end with the hottest June day this century being set on
three days out of four, and the hottest day for any month being
set on two of those.
The previous June mark of
30.0°C was exceeded on the 22nd (31.2°C) then the previous hottest
day (33.3°C in 2003) was exceeded on the 24th (33.6°C) and again
the next day with 34.5°C.
There were also 4 "tropical, (i.e.
minimum at or exceeding 20°C) nights with the previous June record
broken 5 nights in a row - 19.1, 21.4, 22.7, 23.3, 23.2°C. Only
one night this century was warmer, 23.8°C in 2022.
On average, June shows a warming
trend as we go through the month as the sea warms up- the average
for the first 11 days is 15.27°C; the average for the last 11 days
is 17.06°C
The relevant averages for this year
was 14.6°C up to the 11th, and from the 20th-30th the average
temperature was 23.0°C, a huge anomaly of 6°C!
Nationally, the June temperature
record was broken on three succeesive days, with a high of 37.7°C
being recorded at Lingwood, Norfolk. At Bournemouth airport,
the all time temperature record fell on two successive days with a
high of 36.1°C on the 25th.
Rainfall
Month: 64.4mm (142% of normal)
Wettest day 1st, with 16.0mm
Precipitation (> 0.2mm) was
recorded on 13 days, and on the first 11 days of the month.
Only 2.4mm fell after the 11th
Year to date rainfall 440.4mm
(128%) so far this year.
oooOOOooo
Heatwave
!! Hottest day this Century in Springbourne :: Hurn breaks
record.
Posted
at 17:00 on 24th June 2026
This week in weather has been a
remarkable one so far, with the highest temperature I have yet
recorded at this location over 26 years.
For the second time in as many
months, the hottest day and warmest night at this station for the
current month were recorded, and in June's case, on two occasions.
On Monday (22nd) I recorded the
warmest June day this century with a maximum of 31.2°C - passing the
previous high of 30.0°C set in 2017
Monday night into Tuesday was the
warmest June night at 21.4°C
Tuesday saw a slightly less hot day
with a keen easterly wind which had a slight onshore component.
Temperatures dipped from 28°C to around 25c at mid-day but recovered
to record a max of 29.6°C°C just after 6pm. (A statistical quirk due
to the standard 9am-9am meterological day means that Tuesday's max
goes down as 31.2°C, which was the temperature at 9am GMT on
Wednesday!)
The overnight minimum was 22.7°C,
again setting a record for the warmest June night, and many placees
around the country saw their June minimum records broken.
Wednesday saw temperatures rocket,
with the wind a light-moderate northerly, and peaked at 33.6°C. This
beat the previous station record of 33.3°C set in August 2003, and
became only the 6th day to exceed 32°C (90°F, which I always
regarded as the benchmark for truly exceptional heat. A weak sea
breeze then saved us from suffering a 35°C max!
A little further inland, Hurn Airport
also had their hottest day since records begain, the max there was
35.2°C, beating the 34.1°C in August 190, and the previous June
record of 33.8°C set in THAT summer of 1976.Their records go back to
the 1950s.
Nationally, the June record set in
1976 of 35.6 set in Southampton fell at several locations.. at the
time of writing, Gosport in Hants takes the crown at 36.1°C.
oooOOOooo
May 2026: Warmer
than average overall, with half the normal
rainfall
Posted
at 14:00 on 1st June 2026
May 2026:
The month was average
overall up until the 23rd when a specacular heatwave meant that
May ended up being the warmest of the century.
The month was also quite dry
locally with half the normal rainfall.
There was a spectacular
thunderstorm just before midnight on the 27th, which only produced
just under 3mm here. Some areas of Bournemouth reported
grape-sized hail - no hail fell here.Another feature of this
storm was that most of the rain that fell from a relatively
high cloud base actually evaporated before it reached the ground.
Radar accumulation rerurns indicate we should have had ~20mm here,
but just 2.8mm actually reached the ground.
Temperatures:
Highest 30,4°C (29th)
Lowest 4.8°C (11th)
Average Max 19.7°C (+2.5°C)
Average Min 11.4°C (+2.1°C)
Mean for month 15.6°C (+2.4°C)
This was the warmest May this
century, by a margin of 0.6°C
This was also the fourth month
in a row to be significantly warmeer than average - all four
being close to or exceeding a +2°C anomaly.
I will cover Spring as a whole in a
separate post, but a quick check indicates that it was the warmest
this century (12.5°C), beating last year's by 0.5°C
Rainfall
Month: 26.0mm (50.7% of normal)
Wettest day 2nd with 7.0mm
Precipitation (> 0.2mm) was
recorded on 10 days.
Year to date rainfall 376mm (126%)
so far this year. Still well above normal, but continuing to drop
with the much drier weather since 12th March..
A feature of the month was the
showery nature of most of the rain that did fall. We missed much
of it here, other places locally may well have had 75-100mm of
rain after getting a direct hit from torrential showers and the
thunderstorm on the 27th.
oooOOOooo
The
Great May 2026 Heatwave in numbers
Posted
at 15:30 on Friday 29th May 2026
As everyone is
no doubt aware, we have been in the grip of a remarkable and
historic heatwave over the Bank Holiday Weekend, and during this
week.
I thought I'd
put some local perspective on it.
To put things into
perspective, prior to this year, the May record here (going back
to 2000) was 28.3°C recorded in May 2012. The late May
heatwave that year came during an otherwise protracted and
notoriously cold and wet spell that began in early April and
continued until mid July, ruining much of Spring and early Summer
that year. I digress...
Bank Holiday Monday this yeae was the
hottest Bank holiday in recorded history. The national May
temperature record (32.3°C) that had stood for decades was
smashed when Kew Gardens recorded 34.8°C on Monday and was broken
again the following day with 35.1°C at the same site.This is the
earliest date in the UK temperature records, that 35°C has been
exceeded.. by a whole month!
Thursday saw Heathrow reach 32°C,
which makes it six days in a row where somewhere in the UK exceeded
30°C. This would be unusual in high summer, never mind that it's
still Spring.
Here, Bank Holiday Monday saw the
highest temperature of the heatwave, with 30.4°C. That beat the
previous highest temperature for May by a whole 2 degrees. Moreover,
it was also hotter than any JUNE day this century (June record
stands at 30.0°C).
The Wednesday had a maximum of
29.7°C.
Overnight Monday into Tuesday saw the
temperature only falling to 19.6°C, which smashed the previous mark
of 16.9°C for the warmest May night set in 2012.
The overall effect on the May mean
temperature, having been around the 13°C mark a week ago (bang on
average) is now 15.3°C and is set to be the fourth month in a row to
be 2°C or more above average, and as it stands would be the
warmest May this century (beating 2008 and 2025 with 15.0°C).
So why was it so hot?
The primary reason was a huge area of
high pressure which formed over the UK late last week. An area
of high pressure is formed when the air sinks, and in
doing so, sometimes warms the air. Think of putting your finger over
a bicycle tyre pump and pressing the pump. What do you feel? Hot air
as it gets compressed.
The same sort of thing happened on a much larger scale, the air was
compressed and adiabatically heated in the process. Those of us who
are long in the tooth will remember the historic heatwave of 1976
when 32°C (the old 90°F) was exceeded very day in the UK for a
fortnight. The cause of that heatwave was similar. Most of our
heatwaves are usually caused by hot air being advected in from the
Continent, and usually do not last long before the heat gets pushed
away. The heatwave this week was home-grown.
A quick note on what I consider a
"hot" day here on the South Coast - our heat is often moderated by
the sea breeze, hence recording lower maxima than further inland.
The mark I usually use is the old 80° Fahrenheit mark, which is
26.7°C.
Using this standard, we had 4
consecutive hot days - Sunday to Wednesday. Putting that into
perspective, the summers of 2007 to 2011 contained a total of just 5
hot days; three of those were in 2010.
On a final note, I read something
earlier referring to the late May bank holiday weekend of 2007. The
Sunday and Monday that year were a total writeoff. 48h of rain and
wind, and maxima of 11°C and 12°C. Urgh!! The summer that followed
had very little to commend it, either....
oooOOOooo
April 2026: Warmer
than average and very dry
Posted
at 08:30 on 12th May 2026
April 2026:The month was very mild (3rd
warmest of the century after 2007 and 2011), and very dry
with 1/4 of the normal rainfall.
The month was frequently quite
breezy, continuing to dry everything out. As I type this, we've had
26.4mm in the two calendar months since 12th March, in contrast to
the persistent very wet weather up to that point.
Temperatures:
Highest 21.3°C (29th)
Lowest 2.6°C (5th)
Average Max 16.4°C (+2.0)
Average Min 8.2°C (+1.6°C)
Mean for month 12.3°C (+2.0°C)
This was the third warmest April this
century, after 2007 and 2011. I do hope that this summer will not
follow in the footsteps of those two years!
This was also the third month in a
row to be significantly warmeer than average - all three being close
to or exceeding a +2°C anomaly.
Rainfall
Month: 12.6mm (28% of normal)
Wettest day 15th with 5.0mm
Year to date rainfall 350mm (142%) so
far this year. Still well above normal, but dropping from the 211%
of February, 324mm fell up to 12th March.
oooOOOooo
March 2026:
Very mild with half of normal rainfall
Posted
at 17:30 on 2nd April 2026
March
2026:The
month was very mild (joint mildest of the century equalling
2017, and quite dry with half of the normal rainfall.
There
was a considerable amount of settled weather thanks to high
pressure, the lowest pressure all month was 999hPa, compare that
with the three week spell of very low pressure in Jan/Feb I
mentioned in earlier blog entries this year.
Temperatures:
Highest:
20.1°C (31st) - this was the 4th warmest March day this century,
only 30th in 2003, 28th and 29th 2012 were higher with 20.5c,
20.6 and 21.8c respectively.
Lowest:
2.1°C (13th) and no air frost was recorded this month.
Average
maximum: 13.2°C (+1.9°C compared to
average, 2nd highest this century)
Average
minimum: 6.5°C (+1.8°C also 2nd
highest this century)
Mean
temperature for the month: 9.7°C (+1.9°C,
joint warmest with 2017)
Rainfall:
Month
- 25.6mm (47% of normal)
Wettest
day: 12th with 10.8mm
Yesr
to date rainfall stands at 337.4mm (167%)
The
month after the 13th was (mercifully, given the very wet Jan and
Feb!) predominently very dry with only around 4mm falling after
that date.
oooOOOooo
31st March: Warmest day of the year so far, but
will it hold for Easter?
Posted
at 19:30 on 31st March 2026
Today's
maximum temperature reached 20.1°C - the highest of the year so
far. This also brought up a "date record" for this century so
far.
For
those hoping for a fine Easter... unfortunately it looks like
some very deep areas of low pressure may well approach
northern parts of the UK leading to some wet and windy weather
at times, though perhaps less so this far south.
oooOOOooo
February 2026: Very mild and another very wet
month
Posted
at 09:30 on 1st March 2026
February 2026:
The month was very wet, and very mild particularly at night.
The
month was dominated by low pressure tracking unusually much
further south than normal. The extraordinary run of very low
pressure I mentioned last month, with readings almost exclusively
below 1000hPa that began late on 20th January, continued
until the 12th - I cannot find anything in my records to come even
close to equalling this.
The
very wet day on the 18th led to a lot of flooding, disrupting
traffic in many places.
Temperatures:
Very
mild throughout, particularly at night, with no air frost
recorded.
The
monthly mean of 8.8°c is the second highest this century, after
2024. The month was the warmest by night this century.
Max
Temp: 14.1°c (25th)
Min
Temp: 2.0°c (13th)
Average
Daily Maximum: 10.9°c (+1.5°c compared to normal))
Average
Daily minimum: 7,2°c (+3.2°c)
Mean
temperature for month : 8.8°c (+2.4°c)
Rainfall:
136mm
(211% of normal)
Year to
date 312.4mm (also 211% of normal)
Wettest
day 18th (26.6mm)
Precipitation
was recorded on 25 days; only 3 dry days in the month.
The
month was the 2nd wettest Febuary this century, only 2002 was
wetter with 146mm
The
year-to-date total is the 2nd highest, after 2014.
oooOOOooo
January 2026: Very wet, with temperatures close
to average
Posted
at 14:00 on 1st February 2026
January 2026:
The month was very wet, with temperatures just above average.
Temperatures:
The
month started off cold and dry with chiily Easterly winds; the
cold dry spell broke on the 8th with the rest of the month
comparitavely mild.
Max
Temp 11.4°c (12th)
Min
Temp -2.2°c (5th) ; 4 nights brought an air frost.
Average
daily maximum 8.9°c (+0.2°c)
Average
daily minimum 4.2°c (+0.4°c)
Mean
Temperature for month 6.7°c (+0.4°c)
Rainfall:
176.2mm
(211.7% of normal)
Precipitation
was measured on 24 days
The
wettest day was the 26th, with 35.8mm, it was also the wettest
January day this century.
One
note of interest is the remarkable spell of low barometric
pressure since the 21st of the month.
For
context: The long term average air pressure is 1015.2 hPa.
As a
general guide... during periods of settled weather, this value can
rise above 1035-1040 hPa, and during unsettled weather can fall
below 1000 hPa, and more rarely down into the 970-980 range
during particularly unsettled and stormy weahter.
Drops
in pressure below 1000hPa generally last no more than a day or
two, recovering to higher values once the low passes.
Since
late on 20th January, the pressure has remained below 1000hPa
almost continuously and often below 990hPa, apart from a brief
rise to 1001.4 yesterday before falling again. The models are
indicating that the pressure will remain below 1000hPa until at
least Thursday, which will be a 15-day period.
I
thought this was unusual, so I had a look through the records....
Since
2000, I have recorded 5 previous runs where the pressure was
predominently below 1000hPa, for greater than 10 days, with a
run of 13 days (including a brief rise to 1002hPa) oooOOOoooin
October 2023. The most noteworthy spell was 12 days from
16/02/2010 when the pressure remained below 999hPa throughout.
This current spell will likely take the prize for longevity.
So,
what is the cause of this unusually long spell of low pressure?
Normally
the Atlantic jetstream (the mechanism that generates and drives
low pressure systems, generally runs at 55° -ish latitude,
though this can vary a lot. At the moment, it's currently running
into Iberia, which means that the areas of low pressure are
running much further south than usual, and due to the very cold
block of air over eastern Europe and Russia, are grinding to a
halt near or close to southern England.
This is
also the reason why it has been very wet recently, and this coming
week will see little change.
Such
long spells of very low pressure are routine in N Scotland, closer
to where the lows often track, but unusual down here.
oooOOOooo
Wettest January day this century
Posted
at 14:00 on 27th January 2026
The
24 hours to 9am this morning brought 35.8mm of rain. This makes
yesterday the wettest January day this century, and it was no
surprise to hear of many roads in the area being flooded, as
this rain came on top of an already wet month.
This
January so far has produced 145.8mm, which is 175% of the
normal rainfall for the whole of January. This month is already
the third wettest January this century, with only 2014 (198mm)
and 2016 (162mm) being wetter.
The
January record for this century of 198mm was set in the
notoriously wet winter of 2013/14 when six months worth of rain
fell in just 7 weeks.
With
4-5 days of this month left, and further heavy rain likely, I
would not rule out that 198mm mark coming under threat,
oooOOOooo
December 2025 and Year 2025
Summaries
Posted
at 14:00 on 6th January 2026
December 2025: Mild
and rather wet compared to 21st Century average. Very wet first
3 weeks, dry and colder last 10 days.
Temperature:
Highest
- 13.8°c on the 9th; Lowest- -0.6°C on the 30th.
Mean
Maximum 10.5°C (+1.3°C)
Mean
Minimum 6.3°C (+1.5°C)
Mean
Temperature for the month: 8.6°C (+1.5°C)
- =5th warmest this century.
The
6 warmest Decembers this century have all occured since
2015.
Rainfall:
Total
rain for month 122.8mm (133% of
normal). The rain all fell during the first three weeks
of the month
Wettest
day - 21.8mm on the 18th - however at one point 32mm fell within
one 24h period around that date.
Year
2025: Overall
rather warm with almost exactly the annual rainfall.Very dry
spring, warm summer and very wet September.
Mean
temperature for year was 12.7°C (+1.0°C
compared to normal since 2000) - 2nd warmest this century, and
up until the last few cold days of December, we were heading for
the warmest.
To put
this into context - 2022 reamins the warmest at 12.8°C. Only 4
years this century have reached or exceeded 12.5°C: 2022, 2023,
2024, 2025 indicating the warming trend over recent years.
The
summer was the warmest this century (18.9°C)
and consistently and remarkably warm in terms of day
maxima - between 9th June and the end of August, only August
30th failed to achieve at least 20°C - I've never had that
happen before.I regard a summer daily maximum below 18°C as
rather cool; there were only 3 such days in summer 2025, during
the first few days of June.
Spring
(with a mean of 12.0°C) was also the warmest this century, and
the 2nd driest after 2011.
Rainfall:
Total rain for the year was 795.6mm, (101%
of normal, which is 788mm).
Wettest
day: - 43mm on 29th August.
A
very wet January was followed by the dry Spring - summer was
statistically a little drier than normal, but hidden within that
is the fact that half of the entire season's rainfall fell on 2
days alone - 7th June and 29th August. September was wet, too
with Autumn overall seeing a l;ittle above the mormal
amount of rainfall.
oooOOOooo
Cold spell latest: Met Office
issue Amber warning
Posted
at 14:00 on 31st December 2025
The
Met Office have issued an Amber Warning for cold weather valid
to 6th January - the warning covers all of England. Full
information is on their website and social feeds.
Here
this morning we had the coldest night of the season so far with
a minimum of -0.6°C. AS is often the case, Bournemouth Airport
recorded amuch lower temperature, the minimum this morning was
-5.3°C.
So
why is there such a difference? Two main factors here - firstly,
the station is a few miles inland rather then the less than a
mile for this station.Being nearer the coast and the warmer seas
moderates the cold a little. In addition, the Airport is located
over sandy soils, which radiates stored heat much faster at
night leading to bigger temperature falls.This station is
located in an urban area where nights will be less cold in most
circumstances.
The
record for this station this century is -5.8°C recorded on
Christmas morning in 2010; the January record is -5.7°C recorded
the year before. I'm not expecting these records to fall, but
you never know....
oooOOOooo
"...is it going to snow?..."
Posted
at 14:00 on 30th December 2025
With
the forthcoming cold spell, the question on many people's lips
is "Is it going to snow?"
The
short answer is "Dunno... it might...!" The longer answer
follows....
There
are two main issues here. The first is that northerlies
tend to be dry down here, so that while it may be cold enough
for snow, the air is usually too dry for precipitation.
The
second is that any incursion from the west or southwest warms
the air sufficiently so that eventually rain falls rather
than snow, in south-east Dorset.
The
exception to the "too-dry northerly" is that if the air is
sufficiently unstable, then weather features may form in the
flow leading to falls of snow away from the "usual" areas of
north-facing coasts. This is comparatively rare, and in any
case cannot usually be accurately forcasted at ranges of
more than 18-24 hours.
If
I have to stick my neck out, there is a chance that the cold
front hearalding the arrival of the frigid air may bring some
short-loved snow. There is the small chance of small weather
features within the flow producing something
Many
years of weather-watching in these parts suggests a chance of
5-10% chance of snow between Friday this week and the middle
of next when the cold looks set to loosen its grip (as per
current model indications) at least for a time, but
untertainty by that point is considerable.
We
will see!
oooOOOooo
New Year - Cold spell and Snow
Prospects...
Posted
at 10:30 on 28th December 2025
Good
morning. Hope everyone had a good Christmas.
As I
expected, the coldest weather on Christmas Day did indeed pass to
the south of us, giving northern parts of France and even Jersey
some snowfall on the day itself. So close!
One of
my neighbours asked me if it was true that we are going to be hit
by cold weather with snow in the New Year.
My answer: Cold, (colder than we've had in
recent days) quite likely. Snow? Impossible to tell at
more than 2-3 days away. Quite how cold it might get is also up
for grabs, but something notable compares with recent years looks
to be on the cards.
This is what we do know at the
moment:...:
High
confidence of a colder spell starting NYE/NYD. Just how cold it
might get is open to question, but it is unlikely to be as
cold as the infamous Beast From The East episide in February/March
2018.
Increasing
snow risk for some in a potemtially unstable NE to NW wind
Whether
we get snow or rain (if anything falls out
of the sky) in our corner of the world will depend on small
details which are impossible to nail down more (or even less) than
2 days out.
Please please take
no notice of the usual click-bait hyperbole from certain areas of
the press regarding "SNOW BOMB!".... "6ft WALL of SNOW"...
"EXACT date and time it will snow in xxx....". The best place to
keep up to date is the Met Office website and Youtube channel.
oooOOOooo
Christmas Update
Posted
at 10:40 on 21st December 2025
Greetings
to all on the shortest day of the year. The days get longer from
here! This might sound strange, but the earliest sunset (16:02)
was a few days ago, and the latest sunrise (08:10) will
not occur until New Years Day, by which time sunset will already
be about 15 minutes later than it was last week. Google
"Equation of time"...
Thursday's
very wet day (the rain event produced 32mm in all) took December's
total to 114.8mm, which is well above the normal average for the
whole month of 92mm. However, (after the likelihood of some rain
at times later today) it is looking likely at this
stage that we will not add much more for the remainer of the month
as high pressure starts to have more of an influence.
I said
a few days ago that the prospects of a white Christmas were not
encouraging, but that we may well get something more seasonal with
a greater chance of frost as the weather settles down. Since then,
some of the model output have started to show a cold pool of air
crossing southern parts of Britain on Christmas Day, together with
the chance of some wintry precipitation mostly in the
SE. There is still a lot of uncertainty (with it looking more
likely to track further south over France instead) and I
would say the chance is probably 5-10%. It probably wont stop
the usual tabloids' hyperbole though!
Medium
term, it looks like high pressure is likely to take charge at high
latitudes (Scandinavia, initially) over the Christmas/New
Year period, stopping the Atlantic onslaught and bringing a
solid easterly flow by Tuesday. Longer term signals indicate a
continuing high latitude blocking, with the chance of some very
cold weather. The Continent is not that cold at the moment. so the
easterlies will not be too frigid, at least to start with.
Chances
of snow? Impossible to say at this stage, and as we know, it is
very difficult to get snow down here. The most likely outcome at
this stage is rather cold, settled and mostly dry.
oooOOOooo
December so far...
Posted
at 09:30 on 16th December 2025
Think
that this month so far has been mild and wet? You'd be right.
The
normal mean temnperature (since 2000) for December here is
7.1°C. This month so far is running at 10.5°C - this 3.4°C
anomaly is on the large side. 2015's record of 11.7°C does look
pretty safe, however.
The
annual mean temperature is running at 13.0°C (the highest this
century is 12.8) so it's touch and go as to whether we end up
with the warmest year of the century.
Rain
this month so far is 80.4mm - the average for the whole month is
92mm, so this month is running at around 175% of normal.
Annual
mean rainfall is 788mm - as things stand, the YTD total is
753mm, so we look pretty likely to end up almost bang on the
mean this year.
With
Christmas just over a week away, many will be wondering if we
will get a white Christmas this year. The signs are not
encouraging, to say the least, however there are signs that
after a potentially very wet next few days, high pressure
may well bring more settled weather by early next week
and over the holiday period. Depending on wind direction
and cloud cover, this might bring something feeling a bit more
seasonal with a reasonable chance of frost.A lot of water to
flow under the bridge before then, both figuratively and
literally.
oooOOOooo
Station
update
Posted at 1900 on 7th
December
This
morning I had the anemometer replaced. The previous one failed
some 3 weeks ago and I've been running with the spare which is
closer to the roof, and being lower, doesnt pick up the more
gentle winds as easily, resulting in long periods of "no wind".
Previous
anemometers (including the standby one) worked by the rotating
cups passing a magnet over a reed switch which clicks on each
rotation. The quicker the clicks, the faster the wind speed.
Unfortunately,
the reed switches tend to last only 2-3 years. The newer
anemometers use a coil instead of a reed switch, and should
hopefully last a lot longer.
My
thanks to Keith at Master Aerials (Bournemouth) for coming out and
doing the swap-over for me.
On
another note, I have finished ironing out some snags in the
weather data (mainly the rainfall data) which resulted from
importing data going back to the start of 2000 from Davis
Weatherlink to Cumulus MX. Both methods of looking at station
records on this site since 2000 are now reliable. I am
only mising 11 days of data from the end of March 2006 due to a
corrupt file - I am hoping to rescue the missing data in
due course, with the help of Davis.
oooOOOooo
Rainfall Radar
Posted at 0730
on 4th December 2025
I have
added a link to the menu - Rainfall Radar.
This
links directly to the Netweather.tv rainfall radar page.
Netweather
really is an excellent site.
In my
opinion, it has the best, sharpest and clearest rainfall radar
display in the country with high resolution down to 0.5km. It is
an extremely useful tool and shows what is happening
recently/now instead of being a forecast.
An app
is also available from Apple and other app stores to display the
radar on your mobile device.
Also on
the site is a whole range of forecasting model output. Some are
premium features, but there is a lot to look at without a
subscription. There is also a very active community section as
well. Well worth a look.
oooOOOooo
November 2025
Posted at 1015 on 2nd
December 2025
Summary
of November 2025 - Very mild first half with some date records for
this century being broken. Then, a much colder spell after
the 16th with the first air frosts of the season. Ovwerall
the month was milder than usual, and somewhat drier.
The
year continues to be overall slightly drier than normal; the dry
spring being offset by a wet January and a very wet September.
The
month in numbers:
Average
maximum 12.8°c (+0.8°c compared to normal)
Average
minimum 7.7°c (+1.1°c)
Mean
temp for month: 10.3°c (+1.0°c)
Rainfall:
82.8mm (93% of normal)
Rainfall
(YTD) 672.8mm (96% of normal)
oooOOOooo
Things
are changing!!!......
Posted
at 1305 on 30th November 2025.
After almost
30 years of running this weather station (and sixteen of
those running my associated website), I am pleased to say
that I am at last moving the site out of the 1990's and onto a
new software platform.
With changes in
Microsoft Windows, and the fact that some of the software I
use is quite old and is no longer supported, I didnt want to wake
up one morning to find that some elements of the site simply
won't work any more.
The upshot of all this
is that I have updated the weather software I am using
(CumulusMX), used a brilliant add-on template (Cumulus
Utils) and tweaked it somewhat to put together a new
site with a whole host of new features, interactive charts and so
on.
Just a couple of
things I want to highlight:
Firstly.. one of the
new features (Reports.. Yadr from the menu) shows a colored table
for each year showing temperatures and rainfall for each day. It's
worth a look.
Secondly.. you'll find
two menu items for Records and Station Records. The records as
supplied from the template needs some work, as does the imported
data that it uses - I have some quirks to iron out. So for
the monthly, yearly and all time records for this station, please
use "Station Records".
Clicking on Records -
Day Records.. leads to temperature, rainfall and wind records for
each day of the year. The entries in colour have been
set in the past year. These are good to use.
Rain rate records..
there are some unrealistic numbers in there, so I have some data
to clean up.
For those who like
simplicity and familarity, the "legacy" charts are still available
(bookmarks to them will still work) and will continue to be
as long as the software producing them continues to work.
This will
continue to be the "landing page" for the site.
I plan to use this
page to post news and information regarding this weather
station and site, as and when needed. I will also occasionally
post any snippets of interest from time to time, relating to our
local weather.
Have a query, comment
or feedback? Please use the contact details at the top of the
page.