(Updated by 1st of each month)

Issued: Saturday 3rd July 2010

*August*
The new month looks as if it’ll open with an anticyclone to the west or southwest, a ridge extending across the British Isles, southern areas mainly fine and settled with just a light westerly feed of Atlantic air bringing some patchy cloud and outbreaks of showery rain to predominantly the west on northwest of the UK.
This ridge is likely to build as a weak area of high pressure drifts slowly eastward into the near continent. Winds falling light to variable with just a light westerly persisting across the northern half of the UK it’ll be mainly dry and pleasantly warm for a time.
As we approach the middle of the month a slow decline into rather more unsettled pattern as an initially rather weak pattern descends into something rather more low pressure dominated so some rain and stronger winds are indicated for the middle of the month for all areas, although this doesn’t signal the start of autumn just yet as pressure should be building quite strongly later as and anticyclone takes control.
The latter stages of August sees high pressure building and settling over the UK, all areas enjoying a week or so of quite pleasant late-summer weather, the indication that at times the north may become a little more mixed at times as westerly winds push cloud and patchy rain across Scotland and Northern Ireland.

*September*
On the evidence available at the moment it looks as if high will be the dominant feature for some considerable time, building quite strongly through the opening on the month and then persisting right the way through the middle and even in to the middle stages of September.
The emphasis will therefore be on the absence of appreciable rainfall and quite warm, settled and mainly fine conditions especially through the first half of the month when the main centre is expected to be over or close to eastern areas the flow mainly light and variable. There is some indication that through the middle of the month the main centre may be to the west or northwest so perhaps cooling off as time goes by, patchy cloud too and a more noticeable northeast drift later.
The main alteration is indicated during the third week as high pressure retreats westward and allows a stronger westerly to establish over all areas pushing cloud and rain the whole of the UK although southern areas always likely to be influenced by higher pressure, hence drier across England and Wales.