Monthly Summary.

Very warm with heavy showers at first, cooling down later.

The new roof over centre court at Wimbledon was used for the first time on Saturday as thunderstorms developed across many parts of the UK.

Rising heat and humidity were contributory factors in their development, with large hailstones and vast amounts of rain falling in a short space of time. Flash floods occurred in various locations around the country.

Average temperatures for late June to early July are in the range of 17C to 18C in Glasgow and 21C or 22C in London. Saturday saw 28C in London, and temperatures look set to rise even further, beyond 30C for some, with high humidity.

It will become uncomfortable for many, especially at night as it will remain warm and humid. These temperatures have not been seen since the summer of 2006.

Monday 29 June 2009 to Sunday 05 July 2009

“Hot, humid and thundery at times.”

South-easterly winds will bring very warm and humid air from the near continent.

There will be plenty of dry and settled weather for many parts of the UK, which will be accompanied by a good deal of sunshine.

It will be very warm and humid for most, particularly across inland areas. This heat and humidity could trigger some thundery downpours, especially across central, northern and western areas where high rainfall totals are likely.

Elsewhere, rainfall amounts are likely to be near or below the seasonal average.

Confidence is high for hot and humid weather but the locations of the heavy downpours are currently difficult to pinpoint.

Monday 06 July 2009 to Sunday 12 July 2009

"Becoming cooler."

High pressure will begin to build from the south-west, which will bring a slightly cooler Atlantic flow across the UK.

Temperatures will remain above the seasonal average but it will not be as hot as this week.

North-east areas of Scotland will probably see the highest amounts of rain while remaining areas of the UK will experience a scattering of showers, which will bring no more than normal amounts of rain for the time of year.

Away from the showers there should be a good deal of sunshine, which is likely to be more than the seasonal average.

Monday 13 July 2009 to Sunday 26 July 2009

“Warm and showery.”

High pressure, centred over the Azores will dominate. This will bring a west or south-westerly flow of air over the UK.

It will remain quite warm, with average or above average temperatures for the time of year for many. However, parts of central England may be a little bit cooler than the seasonal average.

With high pressure dominating, there will be a good deal of settled weather but there will still be some rain at times. However, this rainfall is likely to be occasional and patchy.

Rainfall amounts are expected to be around the seasonal average with average or above average amounts of sunshine for the time of year.

Will the barbequeues stay out during August? Find out next week.