"The bulk of the UK even to the end of the week stays in this cold air, often quite cloudy, but drier generally away from that far west and south-west corner at the end of the week," Met Office meteorologist Marco Petagna said.
The current weather pattern bringing in cold winds, coupled with thick cloud caused by low pressure from the North Sea, is causing the chilly weather.
High pressure over Scandinavia has led to a blocked weather pattern across the UK and Ireland, Sky News meteorologist Jo Robinson says.
It is the end of the week when a "battle" will begin between "high pressure to the east and low pressure to the south west", according to the Met Office.
She says if the air over the Baltic States and Russia does get colder, it could lead to "bitter conditions" reaching the UK, bringing with it "wintry hazards".
