Temperatures are predicted to drop below freezing across Britain as Arctic winds sweep the country.
Scotland is expected to see hail, sleet or snow in higher altitudes, with the east coast getting a fair share of ice cold showers.
Bournemouth Airport reported a 16C (61F) temperature on Monday, which will fall rapidly in the coming weeks.
Daytime temperatures in the south for Wednesday are predicted to stand between 7C (45F) and 10C (50F). In Scotland and the east coast, this will drop to between 5C (41F) and 8C (46F).
Winds are expected to become more westerly from Thursday with unsettled, warmer weather on the way.
Andy Ratcliffe, a forecaster with MeteoGroup, the weather division of the Press Association, said: "Today we will see cold air pushing across the UK. There will be rain showers, some heavy, in England and Wales, particularly in the afternoon.
"Colder air is coming behind them, and as we go into Tuesday night, it will be cold across the UK, with temperatures close to or below freezing, even down in southern England."
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