Weather Advice UK

The average maximum daytime temperature for London in August is 23C. It could be anything between 16C to over 30C. Up to now it has been average to cool, but there is plenty of time for this to change.

The problem is that our weather is very changeable, nobody can tell you with any certainty what the weather will be like in August. There have been reports on the news about a heat wave in August but we've heard these promises before, the weather usually turns out to be nothing like what they've predicted. Hopefully it will be in the 70's F but nobody really knows, BTW bring some trousers to put on over your "pants" or you may get arrested.😁

I wondered if the word "pants" might be a tad incorrect! I almost said "slacks", but maybe that's not so accurate, either.

We just arrived here in London this afternoon staying close to the Borough underground station. It rained this afternoon for a short while but it wasn't cold but warm and humid.

My advice would be to take shorts, but don't expect to wear them.

What you call “pants”, the Brits call trousers. If you ask for pants, they will think it is what you wear under your trousers.

You can see the forthcoming weather here:>http://www.weather-forecast.com/locations/London/forecasts/latest

Weather forecasts are generally good (accurate) for not more than 3 to 5 days ahead. My limited UK experience is to expect change. During one May trip to northern England, my wife did not expect warm weather and tried to cut the sleeves off of one of her long sleeved shirts.

That said, the UK Met's historical data provides reasonable guidance as to weather ranges and extremes.

http://www.metoffice.gov.uk/climate/uk/regional-climates/so

Southern England: climate Much of the eastern half of this area is
densely populated, as it includes Greater London....

July is the warmest month, with mean daily maximum temperatures in the
London area of 23.5 °C, the highest in the UK. Extreme maximum
temperatures can occur in July or August, and are usually associated
with heat waves lasting several days. Examples include that of late
June/early July 1976, when 35.4 °C was recorded at North Heath, Sussex
on 26 June and 35.6 °C at Southampton on 28 June, the heat wave of
August 1990 when 36.5 °C occurred at Heathrow on 3rd and that of
August 2003 when temperatures over 37 °C were recorded widely on 10th
and a new UK record of 38.5 °C was set at Faversham, Kent. Heat waves
are usually accompanied by warm nights, and notable examples include
minimum temperatures of 23.9 °C at Brighton on 4 August 1990 (setting
a UK record) and 23.2 °C at Ventnor, Isle of Wight on 10 August 2003.

Southern England is susceptible to summer thunderstorms, especially at
inland locations.... Noteworthy examples include the storm at
Hampstead (Greater London) on 14 August 1975, when 169 mm fell in 2.5
hours....

Southern England is susceptible to summer thunderstorms, especially at
inland locations....

Farnborough is about 30 km SW of Heathrow.
http://uk.reuters.com/article/airshow-britain-floods-idUKL8N19X3SV

Mon Jul 11, 2016 3:41pm BST
AIRSHOW-Storm forces Farnborough airshow to shut down for day

A thunderstorm grounded displays at the Farnborough airshow in
southern England on Monday and forced organisers to evacuate the site
in mid-afternoon.

Heavy rain meant that power supplies had to be turned off, bringing an
early end to the first day of the show attended by industry executives
and news reporters.