After a wet start to the new season – with some southern parts of the UK already exceeding their September average rainfall – the next few days will bring our first autumn chill.
Rain will spread southwards on Tuesday, allowing a northerly flow to develop, with air coming from the Arctic.
The Met Office has issued a yellow weather warning for strong winds across northeastern parts of Scotland, running until 6pm, meaning the weather will cause some low-level impacts, including some disruption to travel in a few places.
Temperatures will be well below average for the middle of the week, ranging from 10C to 15C (50F-59F) during the day, but feeling even colder in the brisk wind.
At night, temperatures will be widely in low single figures, with a patchy grass frost likely.
An air frost is possible in parts of the north, especially on Thursday night.
That’s not too unusual in September for Scotland, but if an air frost occurs in northern England, that’ll be the earliest since 2019.
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The cold airmass will bring showers on Wednesday and Thursday, some heavy and thundery, with a little snow likely on the tops of the Scottish mountains – again not that unusual for September.
On Friday, it looks like the northerly flow will be cut off as wind and rain moves in from the Atlantic, allowing temperatures to return to near average for the weekend.