The Met Office has confirmed the start of long-delayed autumn is coming – and it’ll be here by the end of this week.
The change will be hailed by heavy rain which will develop across Wales from tomorrow, with some central and southern parts of England and Wales bracing for the same on Friday.
Then at the weekend, the last remnants of heat will die out – and the cooler mercury will move in.
And, as colder conditions become established from the north, some snow is likely for Scottish mountains, according to the Met Office.
But the cold snap will not just affect the northern parts of England and Scotland – the entire country is set for a harsh introduction to the season.
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Forecasters say daytime temperatures will plunge by up to 10C, and BBC weather predicts a striking 15C drop between day and night.
This will also spark the first widespread overnight frost of the season across many central and northern areas over the weekend.
Met Office deputy chief meteorologist, Brent Walker, said: “As we head through the second half of this week cold air will push southwards across the country and there is a risk that showers over mountains of Scotland could turn wintry.
“By the weekend we expect all regions of the UK to be in the cold airmass and overnight frosts are possible.
“With high pressure continuing to dominate our weather early next week, it will start largely fine, settled, and cool by day, with cold nights and a risk of rural air frosts in places.
“Any early morning mist or fog should clear quickly and there could be a few showers possible around some coasts at times.”
British Weather Service meteorologist Jim Dale also confirmed the slip in temperatures – with sea temperatures cooling.
He told Express.co.uk: “There will be some cold nights and some frosty mornings with some limited Scottish mountain snow. It will be normality for a time.
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“There is a marked sea-change, and obviously it will be colder the further north one goes – but chilly conditions will prevail everywhere after tomorrow.”
Weather maps show temperatures retaining a warm 20C in southern counties such as Kent, Sussex and Essex tomorrow – but by Thursday the drop will be evident.
These counties will dip to 16C on Thursday, then by another 5C on Saturday before Sunday’s final slump at a mere 5C – marking the coldest day in months.
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