England passed the coldest night in 14 years.
This is the first time since 2010 that temperatures in Scotland have dropped to minus 15 degrees Celsius.
Extreme cold and snow shut schools in Scotland and southern England.
The Met Office has issued severe weather warnings for 4 regions in the UK as winter storms are likely to hit this week.
Up to 10 centimeter of snow fell on roads in Scotland.
A yellow warning has been issued for southern Ireland, south Wales and northern England as snow and temperatures drop on Wednesday and Thursday.
Heavy snowfall may disrupt national rail services.
Along with this, the National Meteorological Office has issued flood warnings in 65 places across the country due to the fear of massive floods.