The Met Office has said the current cold weather alert will remain in place until 12pm Wednesday.
It comes as temperatures plunged as low as -8.7C in places on Monday night.
Snow and icy conditions has caused travel chaos across the country in recent days leaving many people stranded or having to abandon their vehicles overnight.
Last night temperatures across the UK fell to the lowest of the year with the mercury plunging as low as -8.7 (16.3F) in places such as Katesbridge, Co Down.
A weather warning for ice is in place today, including in the east Midlands, as freezing temperatures and offshore rain showers increase the risk of slippy surfaces.
Clear skies allowed a satellite image to be taken, showing snow in the Pennines, north Midlands, Northern Ireland and Scotland yesterday.
A chilly night with widespread frost and fog in some parts of the UK which will be slow to lift in the morning.
It's going to feel very cold in parts today, with temperatures between 3C and 6C before falling to as low as -6C in some areas overnight.