September will start on a very dry note with periods of late summer sunshine developing for many in among some variable cloud cover, and from the first weekend of the month will bring a change to a cluster of warm to hot days for many as temperatures climb into the mid 20s in the north and high 20s in the south, it may get even hotter in places as this particular weather event takes a hold from the week starting 6th September (as noted in our long range reports). Unfortunately, this heat is likely to be short-lived with a return to more moderate to normal temperatures for the time of the year. Unfortunately, a more unsettled spell of weather is likely to develop for in and around the mid-month period, and this will bring a mixed spell of widespread showers, and a number of these are likely to turn thundery in places. However, the odd day could feel rather autumnal for the first time of the season from in and around mid-month onwards, but in among some usable days with pleasant sunshine and normal temperatures otherwise. However, after the spell of unsettled weather has passed – there is the potential for a continental influence to bring a surge in temperatures from in and around the 22nd - 29th September and to end the month on a high note with high temperatures. Should this particular event come off, then we could see one of the warmest September periods in some time in terms of the record books. However, it must be noted that this particular weather event is of mixed confidence within our forecasts, and it is one to watch for as this period approaches, as the alternative could see some breezy and wetter weather lingering in to the final third of the month.
A warmer and drier/near-average month overall.
Added: 1st September 2021 - James Madden
Further details on the remainder of Autumn (Oct/Nov) + Winter 2021/22 below & Potential for the coldest Dec/Jan since 2010...
Descriptive and readily available long range weather forecasts for the UK seasons of Autumn 2021 (Sept-Nov) and Winter 2021/22 (Dec-Feb)
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