The big freeze has spread across the UK - and there's more snow on the way!
Up to 5cm of snow fell on Monday night, with north Yorkshire, Lincolnshire and North West England worst affected.
The snow has eased in Scotland and Northern Ireland, but people are still being warned to be careful on icy roads and pavements.
More than 1,000 schools were closed across the UK on Monday, and snow caused travel chaos in Scotland and the north of England.
Nearly 100 people travelling from London to Kent were stuck on a train for two hours after the tracks froze on Monday night.
And in Lincolnshire 60 cars got stuck in the snow, and had to be rescued by police.
In Aberdeenshire, in Scotland, the council has had to start rationing grit for the roads. The coucil said so far it had used 12,000 tonnes of salt to keep the roads clear this year.
BBC weather forecaster Alex Deakin said: "It will be bitterly cold with a bone chilling wind blowing across the whole of the country."
Hayley finds out why the snow isn't bad news for everyone
The extreme cold snap has also affected sport - Chelsea FC couldn't get home on the plane after their 1-1 draw away at Newcastle.
They had to sit on a seven-hour coach journey instead!