The Met Office has warned of further snow and ice across Britain for days as temperatures plummet to -3C.
Up to 3cm of snow will fall overnight into Monday in Scotland, northern England and Northern Ireland hours after Storm Bella battered the country with 100mph winds and torrential rain.
The named storm followed days of wintry weather over Christmas which brought flooding to parts of southern England.
Kicking off a chilly start to the week ahead, today is unlikely to reach any higher than 4C, while yellow weather warnings remains in place until 6pm.
They advise people to be wary of potential slip hazards, particularly where surfaces remain wet from the earlier rain, with continued travel disruptions also expected.
Gloucestershire Police has warned members of the public to take care as reports of snow around the county were causing disruption.
"Heavy snow is starting to fall in the rural parts of the county. This will cause delays on the roads," the force tweeted.
"Only go out if it is essential to do so. Make sure you plan your route and have everything you may need in an emergency including a fully-charged mobile phone.
"We are receiving a number of reports of snow around the county causing disruption, particularly in the Forest of Dean and the A417 around Birdlip.
"Please stay safe and avoid all unnecessary travel."
Meanwhile, the Environment Agency has issued 103 flood warnings and 193 alerts across England, with heavy downpours also set to continue.
The Met Office's forecasting department said the rain moving across Wales and England in the early hours of Monday has the potential to turn to snow.
Snow had already fallen in parts of Scotland, Northern Ireland and England by Sunday afternoon.
BBC forecaster Susan Powell said: "Overnight we see a low spiralling centre roll down towards the Irish Sea - that could pile up quite a bit of snow actually across parts of Scotland, northern England and Northern Ireland.
"1-3cm at lower levels - more than that for higher ground and a significant risk of ice, it's going to make a chilly start to the week ahead."
She went on to say a "nagging northerly" wind will torment Brits throughout what will be a cold day as temperatures struggle to remain in single digits.
Weather charts show lows of -3C in parts of Scotland overnight, while the mercury will remain subzero even in the the day in large swathes of the UK.
"We're going to be staying in the colder air throughout the week ahead," added Ms Powell.
According to the Met Office, the "very cold" air and wintry showers are thanks to low pressure sinking south.
It adds: "Frequent showers will continue on Monday, mainly in the west and around coastal areas. These showers will bring snow to lower levels at times."
However, good spells of crisp winter sunshine between showers are expected, though the northerly winds will continue to bring frost and ice until at least Wednesday.
Glencoe in the Scottish Highlands was yesterday blanketed in thick snow while further south driveways were being cleared in Stirlingshire.
Nenthead in Cumbria was similarly wintry, with snow covering the hills of the northern England village.
Flooding was also reported in parts of eastern England by Sunday morning, with kayakers taking to the roads in Norfolk in an attempt to traverse water-logged streets.
Two severe flood warnings indicating a potential threat to life were still in place at Cogenhoe Mill caravan site near Northampton and on the River Nene near Billing Aquadrome on Sunday morning.
People in areas that have suffered major flooding in recent days are among those who can expect snow, The Sun reports.
Despite the bad conditions, gales meant that for the first time ever more than half of Britain's electricity was generated by wind power on Saturday.
According to energy firm Drax, 50.67 percent of the country's power was produced by wind turbines on Boxing Day.
UK 5 day weather forecast
Today:
Showers affecting some exposed coastal areas throughout, with northerly gales affecting western fringes. A few areas of thicker cloud with rain, sleet or snow, perhaps giving a covering in places. Cold, after overnight frost and ice in places.
Tonight:
Still some coastal showers, and one or two areas of more persistent rain, sleet and snow drifting inland. However many inland areas clearer and frosty, a sharp frost in places.
Tuesday:
Showers still affecting coastal areas in the north, east and west. Many inland counties seeing plenty of sunshine but cold: frost early and late, perhaps the odd freezing fog patch.
Outlook for Wednesday to Friday:
Continuing cold with sunny spells. Wintry showers affecting coasts. Widespread frost inland with some freezing fog patches. Some rain and snow possible in southern England on Wednesday and Thursday.
