Monday 20th September 2021

Autumnal weather has been postponed and we’ll stay reasonably pleasant and warm this week.

It did look like we were going to get a notable taste of autumn late this week, however an ex-tropical storm in the far west of the Atlantic is taking a more southerly track than expected, pushing high pressure further east – which means that the north-westerly flow I was expecting by the end of this week is kind of getting squashed away.

Twice this September, at short notice, ex-tropical systems have affected our weather for the better.

Thanks to Paul for the photograph.

Mostly clear skies tonight, a few patches of mist and fog will form by dawn, down to around 10’C.

Tuesday sees high pressure in charge.

Early mist/fog patches will lift to sunny spells and variable cloud. Likely more cloud than sunshine during the afternoon but remaining bright with some sunny spells. Around 20’C. Fairly clear skies overnight, a small chance of mist/fog patches forming, down to around 10’C.

Wednesday will see good spells of sunshine. Some cloud at times, notably early-mid afternoon, but mostly a fairly sunny day. Around 21’C. Variable cloud overnight, down to around 11’C with a north-westerly breeze picking up.

Thursday morning will be cloudy due to a weak weather front, perhaps a spot of light rain. Becoming sunnier during the afternoon. Warm, 22’C. Clear spells overnight, down to around 12’C though with fog forming in places before dawn.

Early fog patches will clear on Friday, with good sunny spells following. Perhaps clear skies all day – perhaps some fair weather cloud, but either way pleasant and warm, 23’C. Clear at first overnight but low cloud and/or fog forming quite widely, around 13’C.

Saturday starts with either fog or extensive low cloud. It will probably take a little while for it to clear, but the sun should break through for another pleasant day with sunny spells, though not yet certain. Assuming so, then reaching around 21’C. A chance of showers spreading up from the south overnight – though very early stages and very uncertain.

Sunday is more uncertain. Those possible overnight showers could be Sunday morning showers instead – once that clears then again we should see at least some sunny spells, and we will still be in the warm air. But details on that possible area of showers Saturday night/Sunday morning, and levels of sunshine/cloud after are still uncertain.

Early next week probably sees fresher air with some rain/showers push in from the west, but I’m not yet convinced – it is the more likely outcome.

I still see further warmth and sunshine likely around end of September and into the beginning stretch of October – maybe even into mid-October – though occasional rain too.

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