The glorious hot weather is set to come to a halt.
Britons have been making the most of the balmy weather – which saw temperatures hit 25.4C in Yeovilton, Somerset, on Monday, but they are set to see temperatures plunge by up to 10C in the next few days.
Met Office operational meteorologist Martin Bowles said: “We are saying there could be a 10C change in the maximum temperature.
“We have had this period of rather summery weather over the last few days – that is going to change on Tuesday and Wednesday, quite significantly.”
There's a change in weather type coming over the next few days. We are going to see much more in the way of #wind and #rain. It's also going to feel much cooler. Here's why 👇 pic.twitter.com/yNHDhiBosW
— Met Office (@metoffice) September 21, 2020
It comes as warm air from southern Europe is replaced by cold air from the north Atlantic which should see temperatures drop by Thursday.
The Met Office said it may still reach 26C in some places on Tuesday, including in London, but 16C is set to be the highest temperature anywhere in the UK by Thursday.
It is still going to be warm, dry and sunny in parts of the UK on Tuesday – in areas such as south-east England, the Midlands and East Anglia – but cloud is set to build up in the North West.
Large swathes of the country can expect some rain by Wednesday and there will be some reasonably strong winds in the North West, with heavy showers on Thursday.
Mr Bowles said: “There will be a very autumnal feel to the weather which is quite appropriate in a way because Tuesday is the autumnal equinox.
“It is when the astronomical autumn begins so it is quite appropriate we are getting quite a significant change in weather.”
He added: “You would expect a gradual change as we move later in the year, it just happens that as we have got these low pressure systems coming in tomorrow that it coincides with the autumnal equinox.”
In a forecast covering Wednesday to Friday, the Met Office said: “Turning much colder than recently and unsettled with showers and occasional longer spells of rain.
“Some drier, brighter interludes are also likely, especially in the west on Friday.”