More snow is forecast for the weekend and into next week Severe weather warnings have been issued for much of the UK following a day of disruption to roads and schools.
Met Office warnings of heavy snow and icy roads are in place for most of Scotland – from Orkney to the Borders – on Friday evening into Saturday.
Severe conditions are also predicted for Wales, south-west and north-east England and the East Midlands.
Some weekend sporting events have been cancelled as forecasters say the early cold spell could last for two weeks.
It is the earliest widespread snowfall for 17 years.
The latest severe weather warnings for Scotland are for Orkney and Shetland, the Highlands and Grampian, Central, Tayside, Fife, south-west Scotland, Lothian and Borders.
The snow warning in Wales lasts until 1900 GMT on Friday and forecasters urge caution on icy roads until late on Saturday morning. A heavy snow prediction for south-west England has been issued until 0200 GMT on Saturday.
Further heavy snow and ice warnings have been added for north-east England, Yorkshire and Humber and the East Midlands.
There is also a warning of widespread icy roads for Northern Ireland and London and south-east England on Friday evening into Saturday.
Sub-zero temperatures were recorded across the UK overnight into Friday, far lower than those normally experienced in November.
Northern Scotland and north-east England were hardest hit by fresh snowfalls which also moved into South Wales and south-west England later in the day.
The coldest recorded temperature on Friday was in Carterhouse in the Scottish Borders, at -7.8C. Benson in Oxfordshire recorded -7.6C, Newcastle dropped to -4.3C, while the temperature at Kew Gardens in London sank to -3.8C.
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Up to 10cm (4in) of snow has been forecast in Wales for Friday, with up to 15cm on higher ground. Most other places will see 2-5cm of snow in low-lying areas.
BBC weather forecaster Simon King said drivers should expect difficult conditions on Friday evening in south Wales, and parts of Devon, Somerset and Dorset.
On the M4 in south Wales there were reports of a 26-mile tailback in the evening rush hour westbound from the Severn Bridge toll booths to Miskin.
WEATHER AND TRAVEL INFO
Get the latest on school closures and travel problems via your local website Check if snow is forecast in your area at BBC Weather Details of motorway and local road closures and public transport disruption are available at BBC Travel News For advice on handling difficult driving conditions, see the Highways Agency website For information about severe weather warnings, see the Met Office website For information about staying healthy in the cold weather, see the NHS Winter Health website
As the snow clears away to the south overnight there will be further snow showers up the eastern side of Britain and temperatures could drop to as low as -9C.
On Saturday more snow showers are forecast for eastern and northern Scotland and north-east England, and further falls are expected on Sunday with some flurries further south.
On Friday the severe weather disrupted schools in many areas, with more than 160 schools closed or partially closed in north-east Scotland, mostly in Aberdeenshire.
Schools in Northumberland, Tyne and Wear, East and North Yorkshire, and Wales were also affected.
Saturday’s horse racing meeting at Newcastle has been cancelled, with Gosforth Park under 18cm of snow. The meeting at Towcester, Northamptonshire, has also been called off, while events at Carlisle and Leicester on Sunday are in doubt.
The weekend’s FA Cup second round matches could also be at risk.
Rugby Union bosses have vowed that England’s match against South Africa at Twickenham on Saturday will go ahead.
Travel incidents included a plane with 189 passengers overshooting the runway at Newcastle airport in icy conditions on Thursday night. No-one was injured but the airport was closed for a time.
The BBC’s James Cook describes a snowy scene in Aberdeenshire
The AA had attended nearly 12,000 weather-related breakdowns by Friday afternoon, it said. Aberdeenshire, the Newcastle area and North Yorkshire saw 70% increases in incidents on Friday morning.
Up to 15cm of snow blanketed parts of northern and north-east Scotland, and north-east England, on Thursday.
The unusual weather is being caused by high pressure over Greenland and low pressure in the Baltics, forcing cold winds from the north-east across Europe.
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