Before today, all four nations of the UK had recorded their highest temperature of the year so far on Tuesday after very warm air was dragged in from continental Europe.
The addition of the foehn effect – a warming wind on the leeside of a mountain – meant that north-west Wales saw the highest temperatures.
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Wales – 24.8C (76.7F) – Mona, Isle of Anglesey
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England – 22.5C (72.5F) – Merryfield, Somerset
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Scotland – 22.5C (72.5F) – Kinloss, Moray
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Northern Ireland – 19.0C (66.2F) – Armagh, County Armagh
The focus of the highest temperatures on Wednesday will be the Midlands, East Anglia and south-east England, possibly reaching 26C (79F) in some localised spots.
This is around 10C above average for early April.
The last time before this week that 25C or more was recorded in the UK was 19 September 2025, when temperatures peaked at 27.8C at St James’s Park, London.
Around this time in April in 2017 and 2020 25C (77F) was recorded, but last year that temperature was not reached until the last day of the month.
The highest temperature ever recorded in the UK in April was 29.4C (84.9F) measured in London in 1949.
There is some way to go to beat that but spring is the fastest warming season due to climate change.
Scotland and Northern Ireland will not be as warm. The cloud will break to give some sunshine and temperatures could still reach as high as 18C (64F) in eastern Scotland.