Temperatures are set to fall dramatically this week as an Artic blast strikes the country.
Forecasters expect that the cold snap will really start taking hold from Wednesday, with temperatures expected to be around the freezing mark and dipping down to sub-zero overnight.
As for Sunday, it is likely to be breezy, chilly and with a chance of rain, says BBC meteorologist Darren Bett
"We'll continue to find some more showers heading our way."
Rain clouds will start to move in from the east through the day in north-east England and east Scotland but some bright spells will likely burst through in the north-west.
Temperatures are predicted to be between 1 and 4 degrees early on Sunday morning.
"Although we've got more breeze at the moment and on the whole a lot of cloud, temperatures are going to be close to freezing, because it's still cold air," Mr Bett explained.
"So we may well find the risk of touch of frost and some icy patches as well."
Temperatures will rise to 4 or 5 degrees in the daytime for much of the UK as the brisk easterly breeze begins to blow.
Monday is a similar picture - it will start mostly cloudy with showers in the northeast and some sunny spells in the north-west.
Temperatures will be around freezing as the day begins, before rising as the day wears on, peaking at around 9 degrees in the south-east of England.
Showers are predicted to push away in the northeast later with sunny spells developing for most.
A flow of northerly breeze will start to cause temperatures to dip on Tuesday as the cold front begins to move in, but sunshine is still forecast for many parts of the country.
Come Wednesday, snow is likely further north into Scotland, with temperatures predicted to be below average for this time of year at just above freezing.
The Met Office has issued a yellow snow warning for parts of northern Scotland on Wednesday, meaning travel disruption is likely with roads and railways affected and longer journey times should be expected by car, bus and train.
Snowfall of up to 10cm is predicted in certain areas, with strong northerly winds bringing the possibility of drifting and blizzard-like conditions.
This could also heighten the risk of hard frozen nights and icy roads come the morning, so motorists are advised to be cautious.
The five day Met Office forecast
Today:
Rather cloudy for most with some sunny intervals mainly in the west and northwest. Showers continuing to feed into eastern parts, especially from Norfolk northwards, but mostly dry elsewhere. Feeling chilly in the northeasterly breeze.
Tonight:
Cloudy for most with showers for eastern areas, particularly Norfolk northwards. Some clear spells in west but breeze keeping temperatures from falling too low. More widespread frost in northern Scotland.
Monday:
Cloudy with showers feeding into eastern areas and spreading into southeast England. Drier with good sunny spells for Scotland though northern parts still seeing showers. Staying cold and breezy.
Outlook for Tuesday to Thursday:
Mostly cloudy with occasional showers Tuesday. Turning colder Wednesday and Thursday with snow showers across northern Scotland and perhaps parts of Northern Ireland and northeast England. Sunny spells elsewhere.
