Met Office Chief Meteorologist Dan Suri said: “It will stay drier and brighter elsewhere, even so, it will be a marked change from the 18 or 19 Celsius we have been seeing in a few spots this week.
“This cold, bright weather is due mainly to a high-pressure system that is developing to the west of the UK, which will bring cold air down from the north.”
On Monday morning, the south and west saw patchy frost, while showers are on the way for some parts.
The Met Office tweeted: “Another cold start on Monday morning with patchy #frost in the south and west.
“Eastern areas will see some #showers with rain whilst the west will see the best of the #sunshine with rays.”