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Offline Global Warming  
#1 Posted : 28 July 2013 16:02:49(UTC)
Global Warming

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Joined: 07/10/2006(UTC)
Posts: 6,258

July retrospective

The first above average month of the year and well above average at that. Likely to finish just under 2C above average. So far 2013 has seen every month of the year at least 0.5C either above or below average. The pattern matching for July was useless as it did not predict any real chance of very warm weather.

Looking ahead to August

Early indications are that apart from a brief hot spell at the start of the month we could be looking at very average conditions in the first half of the month.

Please place your August CET predictions in this thread. The deadline for entries with no penalty is 23:59 on 31 July. Late entries will be accepted up to 23:59 on 2 August but are subject to a penalty of 0.2C per day for the purposes of the annual competition.

August historic data summary

Here is the usual rundown of historic data for previous years.

We have not had a warm August since 2004 so perhaps we are due one. 2004 saw 17.6C and the previous year saw 18.3C. The last really hot August was 1995 with 19.2C. Three of the last 6 August's saw a CET of 15.3C or 15.4C (2007, 2010 and 2011). In 2012 the CET was a little above average at 16.7C.

Long run averages:
1971-2000: 16.2C
1981-2010: 16.4C
1988-2012: 16.5C

Here is a chart of the July CET since 1961 with a 10 year moving average

Here are some details of what the models and forecasters generally are saying at the moment.


A hot start potentially but then very average but fairly dry.   

ECM ensembles (De Bilt)
A very warm start to the month but temperatures then drifting down towards and even below average. 

After a hot start turning cooler but then could see a fair bit of warmer weather from mid month onwards. 

Met office
Contingency planners forecast not yet available but probably will be released on Monday

30 day forecast - after a brief hot start generally average temperatures for the rest of the month

Pattern matching (just for fun)

Looking at years since 1900 with a Jun - Jul temperature of 15.5C to 16.5C and July temperature of 17.7C to 18.8C there are only 8 matches. No obvious pattern can be discerned from this. In some years (1900 and 1901) August was very cool, in others (1911 and 1995) it was hot and in others it was about average.

So no clear signal at all this month.


Edited by moderator 28 July 2013 16:20:07(UTC)  | Reason: Not specified

Chineham, Basingstoke, Hampshire, 86m asl

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Offline ARTzeman  
#2 Posted : 28 July 2013 16:15:29(UTC)

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Location: Peasedown St John. N.E. Sommerset

Sticking my neck out and going for...... 19.1c.....

Some people walk in the rain.
Others just get wet.
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Online Hungry Tiger  
#3 Posted : 28 July 2013 16:39:40(UTC)
Hungry Tiger

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Location: South Cambridgeshire

I'll go for just above average I reckon. That's going on the basis of a few hot days and then most of the rest being around average or just above.

I'll go for


Gavin S.
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South Cambridgeshire. 93 metres or 302.25 feet asl.
Offline Caz  
#4 Posted : 28 July 2013 16:59:26(UTC)

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Posts: 20,287
Location: Market Warsop, Nottinghamshire, East Midlands

As your stats show that no month this year has been within 0.5c of average, I'm going with that theme and we're overdue a good August, so I'm going to plump for

17.2c please GW.

Market Warsop, North Nottinghamshire.
Join the fun and banter of the monthly CET competition. Discuss monthly temperatures and records.
Offline Gavin P  
#5 Posted : 28 July 2013 17:09:40(UTC)
Gavin P

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Posts: 35,320
United Kingdom

Wouldn't it be extraordinary if after an 18c July we had a 14c August...

Rural West Northants 120m asl
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Offline Essan  
#6 Posted : 28 July 2013 17:44:29(UTC)

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Location: Albion

I'm expecting a rather typical British summer month.  Warm in the south at times, so the CET (2 of which stations are in the south) looks like being a bit above average.


Edited by user 31 July 2013 17:14:35(UTC)  | Reason: Not specified

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Offline cowman  
#7 Posted : 28 July 2013 18:31:20(UTC)

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Joined: 11/02/2013(UTC)
Posts: 904
United Kingdom
Location: uttoxeter

16.8 c for me please.
#8 Posted : 28 July 2013 18:44:34(UTC)

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Posts: 6,714

17.0C please.

Offline Hippydave  
#9 Posted : 28 July 2013 19:10:07(UTC)

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Posts: 1,163
Location: Tunbridge Wells

16.9c for me please

Nout overly hot after the first few days but a beautiful dry 7 days coinciding with my hols down in Cornwall

Home: Tunbridge Wells
Work: East Grinstead
#10 Posted : 29 July 2013 08:51:30(UTC)

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20.2 exceptional heat ,excessive sunshine 100f to be broken .
Offline Charmhills  
#11 Posted : 29 July 2013 09:19:53(UTC)

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Posts: 47,138
Location: Everywhere

17.2c with average rainfall for most.


Online doctormog  
#12 Posted : 29 July 2013 09:21:13(UTC)

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Posts: 70,335

17.1°C for me please.
#13 Posted : 29 July 2013 09:35:10(UTC)

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It seems nigh on impossible to call between predominately north-westerly or south-westerly. I'm gonna guess at 16.8c please
Offline Shez5690  
#14 Posted : 29 July 2013 09:56:26(UTC)

Rank: Advanced Member

Joined: 20/11/2007(UTC)
Posts: 345
Location: Bridgnorth, Shropshire

17.3c for me please

Offline springsunshine  
#15 Posted : 29 July 2013 10:31:42(UTC)

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Joined: 14/11/2011(UTC)
Posts: 1,413
Location: Bournemouth

a very unsettled month cominmg so a coolish 16.2c

Online Roonie  
#16 Posted : 29 July 2013 10:36:52(UTC)

Rank: Advanced Member

Joined: 06/04/2006(UTC)
Posts: 3,367
Location: North Worcestershire

17.17 please

Still Lurking.......

North Worcestershire
Offline Ally Pally Snowman  
#17 Posted : 29 July 2013 11:05:32(UTC)
Ally Pally Snowman

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Posts: 6,087
United Kingdom
Location: Bishop's Stortford, Hertfordshire

Another hot month 18.6c


Offline Surrey John  
#18 Posted : 29 July 2013 13:15:26(UTC)
Surrey John

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Posts: 775
Location: Kingston upon Thames

A warmish 17.65c for me please
Kingston upon Thames

15m ASL
Offline Stormchaser  
#19 Posted : 29 July 2013 17:05:40(UTC)

Rank: Advanced Member

Joined: 24/10/2008(UTC)
Posts: 11,847
Location: West Hants

Just to mess with your minds an estimation using the 12z GFS op run's raw data produces a CET over 20°C to 14th August

The run is considerably hotter than most recent ones, but the changes do start at just four days range... minds messed with now?

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Offline Rob K  
#20 Posted : 29 July 2013 18:50:10(UTC)
Rob K

Rank: Advanced Member

Joined: 02/05/2006(UTC)
Posts: 21,773
Location: Northeast Hampshire

Originally Posted by: vince Go to Quoted Post
20.2 exceptional heat ,excessive sunshine 100f to be broken .

I hope so, but I am going to plump for a more realistic 18.4C.

Yateley, NE Hampshire, 73m asl.
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