Spring technically started today but parts of the UK could see several inches of snow tonight as the wintry weather continues.
A weather warning has been issued for much of Wales, Northern Ireland and western parts of north England and Scotland.
Transport disruption could be caused by up to 10cm of snow on higher ground and ice will be an additional hazard across northern Britain.
The Met Office said the conditions were being caused by a cold westerly flow from Canada bringing a mix of sleet, snow and hail showers on Sunday night into Monday.
But with warmer daytime temperatures and sunshine, any snow or ice is likely to melt in the morning.
“Some people will see snow and others won’t – it’s hit and miss,” a forecaster at the Met Office said.
“It’s unlikely that it will settle and cause disruption. With the roads warming up, any snow that falls will just melt away in the daytime.”
Conditions in southern and eastern parts will be drier with sunny spells, although blustery rain showers are expected for most of Monday.
The warmest places are in south-east England, with temperatures hitting 12C in Heathrow today, although most of the UK was still in single figures and Bowling, in Scotland, struggled to reach 2C.
UK winter weather
UK winter weather
1/30 UK winter weather
Cars make their way through the snow in the Loxley area of Sheffield
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A cyclist makes his way through a blizzard in Durham
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Heavy snow falls on the A690 into Durham
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Picture of snow taken through a window of a plane stuck at Manchester Airport
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A woman walks in heavy snow in the Loxley area of Sheffield
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Heavy snow in the Loxley area of Sheffield
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A snow covered Durham Cathedral
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Snow covered graves at St Joseph's Church in west Belfast, as an orange weather alert is announced in Northern Ireland
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Sheep in snow, in the Glens of Antrim, as an orange weather alert is announced in Northern Ireland
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Snow Blizzards on the A9 road near Blackford, Perthshire as snow blizzards sweep across the country
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A cyclist on Dumbarton Road in Stirling during a snow blizzard
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A dog walker walks through the Kings Knot area below Stirling Castle during a snow blizzard
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Vehicles driving down Dumbarton Road in Stirling during a snow blizzard
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Scotrail train travels through snow covered country side near Lenzie, Scotland
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A man digs his car out of the snow near Shaw, northern England
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A dog walker in the snow on the Pennine hilltops near Reeth in the Yorkshire Dales, as many parts of the UK were on snow alert with wintry showers threatening to disrupt travel
John Giles/PA Wire
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A snow plough on the A93 near Guildtown, as snow brings fresh disruption to parts of the UK
Danny Lawson/PA Wire
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Andrew Millington (left) and Stephen Peacock walk near the Spittal of Glenshee as snow brings fresh disruption to parts of the UK
Danny Lawson/PA Wire
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Snow covers the A68 near Corbridge in Northumberland, as many parts of the UK were on snow alert with wintry showers threatening to disrupt travel
Owen Humphreys/PA Wire
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A car makes its way through snowfall in Gortin near Omagh, as many parts of the UK were on snow alert with wintry showers threatening to disrupt travel
Niall Carson/PA Wire
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Sleaford Lincolnshire in the snow Boxing Day 2014
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Snow at Liverpool's John Lennon Airport, which closed temporarily on Friday night
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Maisy Byrne, aged nine, (left) and sister Lulu Byrne, aged seven, have fun as snow falls on Boxing Day in Gateacre, Liverpool
Peter Byrne/PA Wire
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A decorative snowman surrounded by real snow outside a house in Eccleston Park, near Prescot, Merseyside
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Maisy Byrne, 9, left, and sister Lulu Byrne, 7, have fun as snow falls in Gateacre, Liverpool
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Snowfall in Uttoxeter, Staffordshire on Boxing Day
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A man pushing a motorcycle through snow in Newtown Linford, Leicestershire on Boxing Day
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On the M6 near Sandbach
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Snow swirling around the grounds of Lichfield Cathedral on Boxing Day
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Referee Mark Clattenburg during the Premier League football match between Manchester City and West Bromwich Albion at The Hawthorns in the Midlands
The forecaster said: “It’s still normal for the time of year. It’s nothing out of the ordinary because we have literally just come out of the meteorological winter.
“We are expecting that this could be one of the last spells of snowfall.”
The cold snap comes after a short-lived spell of unseasonably warm weather that seemed to herald the start of spring at the end of last week.
Britain is currently on course to have its sunniest winter in almost a century.
Statistics released by the Met Office show that by 25 February the country will have already seen 189 hours of sunshine – equal to the 2001 record.
However, although the UK overall has enjoyed glorious weather, parts of the country have had their wettest winters in years.