The freak mid-April cold snap will intensify today with more bitingly cold weather and lows as sharp as -8C in some areas.
Forecasters said that the freezing weather was down to ‘unusually chilly air’ from the Arctic which arrived at the end of last week.
But the Met Office said that temperatures would slowly begin to climb throughout the day and that there would be plenty of sunshine in many regions.
It comes after bitingly cold temperatures as low as -3C draped parts of the country in time for the re-opening of pubs, shops and outdoor attractions on Monday.
The Met Office earlier said that record low April temperatures had been recorded in some parts of the UK overnight on Sunday and that temperatures would struggle to get into double figures at the start of the week.
Speaking of Tuesday’s forecast Aidan McGivern at the Met Office said the UK should brace for ‘yet another frosty start’ quite widely on Tuesday morning, but with sunny spells in many areas.
There will also be scattered showers particularly in western areas by the afternoon and throughout the day.
He said: “It is a cold start to Tuesday but it’s a bright start with plenty of sunshine for Scotland, for northern and eastern England, a bit more cloud further west.”
He added that ‘widespread frost is expected further north and east. Minus one to minus two in towns and cities.
“As low as minus eight Celsius in sheltered parts of northern England and central Scotland.”
But he said that ‘despite the chill’ it would be a largely bright start to the day for many.
Temperatures are also expected to begin to climb, eventually reaching highs of about 13 C by the late afternoon in southern regions.
With the sporadic rainfall there are also alerts in place for flooding and the Environment Agency in England has issued five alerts, meaning flooding is possible, so people should be prepared in those affected regions.
UK Weather Forecast
Most parts dry with sunny spells and light winds, so feeling a touch warmer than recently despite temperatures being below average. A few showers, mainly for central and western areas.
Variable cloud with light winds this evening and overnight, with frost likely for many, particularly in the north and east.
Dry for most with only a few showers over Wales, the southwest and Northern Ireland. Temperatures below average but feeling pleasant in sunshine in the west.