The Weather Outlook

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Brian Gaze
14 August 2025 08:40:35

Met Office reporting 17.6C to 12/08. 


Brian Gaze

Berkhamsted

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The Beast from the East
14 August 2025 09:17:56

Met Office reporting 17.6C to 12/08. 

Originally Posted by: Brian Gaze 

If we get the GH cool down, its game over.  All depends on Hurricane Erin now helping the azores ridge


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Bertwhistle
14 August 2025 11:32:30

If we get the GH cool down, its game over.  All depends on Hurricane Erin now helping the azores ridge

Originally Posted by: The Beast from the East 

But not necessarily enough to reduce the August CET from what will be over 18 by early next week to anything lower than the high 16s I suspect. Even a 16.6 for August would put us among the hottest summers, (1995,2006,2022) potentially 4th in the series. But at 18.2 say on 19th, we'd need the last 12 days to average below 15.1 to dip below 17 overall for the month. It would need to be a sustained cooler spell for that- quite possible of course. For the 16.6 whole month the last 12 days would need to average below 14.1 and that is obviously less likely, especially given high SSTs and soil temperatures. What's been surprising about this summer is that both June and August started off cool, but this was reversed so very quickly by repeated or sustained hot spells. 


Bertie, Itchen Valley.

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GezM
  • GezM
  • Advanced Member
15 August 2025 15:24:36

Latest CET is 18.1C up to the 14th. Plugging in some raw data for the 3 CET stations for the next 10 days takes us to around 17.6C up to the 24th. Adding an arbitrary 16C average across the last 7 days brings us to around 17.2C. 

So 3rd place finish still possible, 1st place unlikely in my opinion. Especially when that last 7 days could be rather cooler than the figure I plugged in. 


Living in St Albans, Herts (116m asl)

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Bertwhistle
15 August 2025 18:38:18

Reasoned analysis GezM. Thanks.


Bertie, Itchen Valley.

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DEW
  • DEW
  • Advanced Member
17 August 2025 12:16:53

https://www.bbc.co.uk/news/articles/c2enmn7j3zjo 

Blackberries were seen in London on 22 June, according to the Woodland Trust. By contrast the earliest in 2024 was 4 July in Southampton - but scientists need more information to be certain about the long-term trend.

I've picked one lot of blackberries last week (and made bramble jelly) - I wouldn' t normally expect to do that until 1st or 2nd week of September.

Apple picking at the West Dean orchard had 5 varieties on sale by 1st August this year. The date I've recorded for the first apples on sale - and that for just one variety  - has been 

31/8/12, 23/8/13, 6/8/14, 28/8/15, 20/8/16 ... not recorded ...18/8/22, 4/8/23, 2/8/24, 14/7/25


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Chichester 12m asl

Saint Snow
21 August 2025 12:59:40

Last night was the first time in quite a while that I felt chilly in bed.


Martin

Home: St Helens (26m asl) Work: Manchester (75m asl)

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NMA
  • NMA
  • Advanced Member
21 August 2025 14:18:36

When it comes for TWO members to review this past summer I’m sure there will be one or two members in Middle England for whom the summer was a damp squib and wondered what the fuss was about.


Vale of the Great Dairies

South Dorset

Elevation 60m 197ft

DEW
  • DEW
  • Advanced Member
21 August 2025 14:59:18

Like 1976 when it was pleasantly average in Manchester where I was completing the summer term, while wife and daughter were sweltering in Kent (we'd moved early to fit in with the house buying chain)


War is God's way of teaching Americans geography - Ambrose Bierce

Chichester 12m asl

Retron
21 August 2025 15:36:35

Like 1976 when it was pleasantly average in Manchester where I was completing the summer term, while wife and daughter were sweltering in Kent (we'd moved early to fit in with the house buying chain)

Originally Posted by: DEW 

76 wasn't even that warm in Kent by modern standards. In Brogdale (which held the UK temperature record for a decade) there were only 4 days of 30C or higher, the absolute max was 32.0 and there were several days in the teens mixed in - 13 of them, to be exact, compared with just 6 so far this summer.

2025 has also seen 4 days above 30, an absolute max of 35.8, and currently has a mean max for the whole summer of 24.2 compared with 23.6 in 1976.

Yet people don't bat an eyelid these days, and when you point it out on local newspaper comments people don't believe you, as *they* remember it as an amazing scorcher (which it was, *then*, but not so now!)


Leysdown, north Kent
Bertwhistle
21 August 2025 18:08:00

76 wasn't even that warm in Kent by modern standards. In Brogdale (which held the UK temperature record for a decade) there were only 4 days of 30C or higher, the absolute max was 32.0 and there were several days in the teens mixed in - 13 of them, to be exact, compared with just 6 so far this summer.

2025 has also seen 4 days above 30, an absolute max of 35.8, and currently has a mean max for the whole summer of 24.2 compared with 23.6 in 1976.

Yet people don't bat an eyelid these days, and when you point it out on local newspaper comments people don't believe you, as *they* remember it as an amazing scorcher (which it was, *then*, but not so now!)

Originally Posted by: Retron 

This has been mentioned a few times and I think it's important to remember that localities don't necessarily reflect the bigger picture. Some of the more amazing temperatures of the 1976 summer involved E or NE winds and in late June/early July the N Sea would not have warmed sufficiently to mitigate against that for places like N Kent. 

In fact the whole of the super heatwave, if I may be allowed to use such a course term, was dominated by winds with an easterly component. Looking at the CET outcomes for the previous June period, and subsequent July period, it is pretty clear that these two months acquired their high CETs from this heatwave. August was a different matter- more prolonged dry and sunny weather over parched ground allowed persistent mid to high twenties, with only the odd 30. Mayflower Park in Southampton was particularly suited to high temperatures during the heatwave, as was Cheltenham. 


Bertie, Itchen Valley.

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Retron
21 August 2025 18:15:25

This has been mentioned a few times and I think it's important to remember that localities don't necessarily reflect the bigger picture.

Originally Posted by: Bertwhistle 

Bear in mind the comment I was replying to this time was about Kent, it's why I mentioned it. There have been some lengthy NE'ly spells this summer, too, but also bear in mind how temperatures down here have risen more than most places in the UK - we've had a 1.5 degree warming from the 61-90 to 91-20 period, so 1976 levels of heat would anyway be more likely here.

It's really quite noticeable how the climate's shifted. 25 years ago I assumed a 1 or 2 degree rise wouldn't really do much - going from 21 to 23 in summer wouldn't be that bad, going from 6 to 8 in winter likewise. In reality it's become far more "spiky", for want of a better word, and I hadn't realised just how hard it'd be to get a cold spell, winter or summer - I'd assumed instead of -2 days in winter every few years we'd still get 0C days, but the reality is that even getting a 3C day is hard work! 


Leysdown, north Kent
DEW
  • DEW
  • Advanced Member
21 August 2025 18:38:00

This has been mentioned a few times and I think it's important to remember that localities don't necessarily reflect the bigger picture. Some of the more amazing temperatures of the 1976 summer involved E or NE winds and in late June/early July the N Sea would not have warmed sufficiently to mitigate against that for places like N Kent. 

Originally Posted by: Bertwhistle 

Darren is likely right for N Kent, but the heat that my family (and at weekends, me) were experiencing was on the other side of the Downs, near Maidstone. But I agree that 1976 is increasingly overshadowed (if that's the right word) by the recent sequence of hotter years.


War is God's way of teaching Americans geography - Ambrose Bierce

Chichester 12m asl

TimS
  • TimS
  • Advanced Member
21 August 2025 18:52:56
One thing the historical stats we’ve been looking at reinforce, for me, is quite how exceptional summer 1995 was. 

1976, fine, the culmination of a 2 year drought and a 2 week heatwave which if it happened today would give us day after day of mid-high 30s. 

But 1995: that sheer number of 30C days, the consistency of hot and dry weather from late June to late August, and above all the record breaking July-August combination. Only 2022 gives us a similar level of July-August double hit.

Only a very chilly first half of June drags it down from absolutely trouncing 1976 on all fronts. 


Brockley, South East London 30m asl
sunny coast
22 August 2025 06:05:43

One thing the historical stats we’ve been looking at reinforce, for me, is quite how exceptional summer 1995 was. 

1976, fine, the culmination of a 2 year drought and a 2 week heatwave which if it happened today would give us day after day of mid-high 30s. 

But 1995: that sheer number of 30C days, the consistency of hot and dry weather from late June to late August, and above all the record breaking July-August combination. Only 2022 gives us a similar level of July-August double hit.

Only a very chilly first half of June drags it down from absolutely trouncing 1976 on all fronts. 

Originally Posted by: TimS 

Yes def the most exceptional and consistent summer of my lifetime.  

Brian Gaze
24 August 2025 11:59:13

Provisional to 22/08, so it looks like we'll probably just fall short.

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Brian Gaze

Berkhamsted

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Brian Gaze
31 August 2025 14:57:41

An amazing photo finish!

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Brian Gaze

Berkhamsted

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Brian Gaze
01 September 2025 13:33:12

The UK  Met Office is reporting a Central England Temperature (CET) of 17.7°C for August. The TWO CET analyser suggests the meteorological summer 2025 is tied with 1976 at the top of the table, which dates back to 1659

That said, although our CET database uses data from the UK Met Office, it may not include the latest revisions, so it's still possible that 2025 could end up slightly above or below 1976.

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Brian Gaze

Berkhamsted

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Saint Snow
01 September 2025 16:05:00

What do we think of this BBC article today, that states 1976 isn't even in the top 5 now??

https://www.bbc.co.uk/weather/articles/c1kz18d3wjro 


Martin

Home: St Helens (26m asl) Work: Manchester (75m asl)

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Retron
01 September 2025 16:30:29

What do we think of this BBC article today, that states 1976 isn't even in the top 5 now??

https://www.bbc.co.uk/weather/articles/c1kz18d3wjro 

Originally Posted by: Saint Snow 

They're not using the CET for that statement, so it makes sense!


Leysdown, north Kent
Retron
01 September 2025 16:39:48
And now that Brogdale's updated, we have this for my part of Kent in terms of maxima, which are the things people care most about:

1976: Jun: 23.9, Jul: 24.4, Aug: 22.4, Overall: 23.5

2015: Jun: 24.5, Jul: 23.4, Aug: 23.0, Overall: 23.9

There were 4 days of 30C or more in both 1976 and 2025, with an absolute max of 32.0 in 1976 and 35.8 in 2025.

There were 79 days of 20C or more in 1976, the longest run being 30 days. In 2015 there were 84 days and the longest run was 43 days.

Aside from the mean high in July, most other metrics show 2025 handily beating 1976. And yet, as I've said before, nobody bats an eyelid - they still waffle on about 1976 as if it was the warmest summer ever!


Leysdown, north Kent
Brian Gaze
01 September 2025 17:03:12

What do we think of this BBC article today, that states 1976 isn't even in the top 5 now??

https://www.bbc.co.uk/weather/articles/c1kz18d3wjro 

Originally Posted by: Saint Snow 

As Darren says, that's for the UK as a whole. The data I posted is for the CET zone.


Brian Gaze

Berkhamsted

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lanky
02 September 2025 10:24:18

Courtesy of Kevin Bradshaw's (aka Mr Data, Summer 1995) formula for the Manchester Summer Index, I have done the London Summer Index for this summer just finished using Weatheronline data for London Heathrow (03772)

https://www.weatheronline.co.uk/weather/maps/city?WMO=03772&CONT=ukuk&LAND=UK&ART=SON&LEVEL=150 

This summer comes out 13th in the league table going back to 1900

1976 363

1995 338

2022 336

2018 331

1989 328

1911 328

2003 320

1975 317

1949 313

1983 313

1996 312

1933 311

2025 310

You might recall the formula uses the average daily max temp, the total of sun hours and the number of rain days to build up a single value as shown via 10*[av (maxT) + (sun hours/67) - (rain days/8)]

This years average maxT for London Heathrow put it 3rd in the table behind 2022 and 1976 resp but the sun hours (56th) and the rain days (26th) were way off the pace for a higher placing. 

(Note that this for London data not UK or CET Region where 2025 came or tied first place)


Martin

Richmond, Surrey

Frank H
02 September 2025 10:54:47

Courtesy of Kevin Bradshaw's (aka Mr Data, Summer 1995) formula for the Manchester Summer Index, I have done the London Summer Index for this summer just finished using Weatheronline data for London Heathrow (03772)

https://www.weatheronline.co.uk/weather/maps/city?WMO=03772&CONT=ukuk&LAND=UK&ART=SON&LEVEL=150 

This summer comes out 13th in the league table going back to 1900

1976 363

1995 338

2022 336

2018 331

1989 328

1911 328

2003 320

1975 317

1949 313

1983 313

1996 312

1933 311

2025 310

You might recall the formula uses the average daily max temp, the total of sun hours and the number of rain days to build up a single value as shown via 10*[av (maxT) + (sun hours/67) - (rain days/8)]

This years average maxT for London Heathrow put it 3rd in the table behind 2022 and 1976 resp but the sun hours (56th) and the rain days (26th) were way off the pace for a higher placing. 

(Note that this for London data not UK or CET Region where 2025 came or tied first place)

Originally Posted by: lanky 

I've read elsewhere that Kevin has quoted the final 2025 Manchester summer index as 240

This is well below the 1976 and 1995 values of 301 and 298 


Wrightington, Wigan
Bertwhistle
07 September 2025 17:52:45

Seems 2025 has come out, amazingly, top for both UK and CET (by a whisker) even if not for the Manchester area. The unpredictability of the weather here is one reason why we shouldn't talk 'front loaded' in June, just because June is a hot one.


Bertie, Itchen Valley.

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