The plummeting overnight temperatures are set to continue after many in the UK were greeted to more frost and ice this morning.
The Met Office recorded a low of -5.6C at Benson, in South Oxfordshire, early on Tuesday.
In a tweet, it said: "It is a cold and frosty start for many of us this morning."
Weather maps from WXCharts show this month's temperatures are starting mild, with the trend of 12C to 15C highs during the daytime expected in the coming week.
This is slightly higher than the average for April.
The service, which uses data from MetDesk, shows temperatures dropping to freezing overnight before rising by 10C as the days progress.
This time next week, the mercury is, however, expected to go in the opposite direction.
Charts show a chilly plume gravitating from Western Europe and arriving in the UK from April 11 - but its main impact will be to the north and east of the country.
By the following morning on Wednesday, April 12, the charts show lows of -6C to -7C in the same places, while elsewhere drops to -5C.
Bursts of rain are also forecast for much of Britain in the run up to Easter weekend - though the bank holiday itself could be much nicer.
It comes as England saw the wettest March in more than 40 years.
Data up to March 30 showed 111.3mm of rain has fallen in the month across the country, 91% more than average.
As a result, water levels appear to have increased, with huge visible differences compared with the summer.
From Good Friday to Easter Monday, many Brits will be looking to get away and the weather is forecast to be perfect for any trip to the beach, or day out.
Next Monday looks set to be the warmest of the four days according to Ventusky, with temperatures set to top 16C in places.
The Czech meteorologists have predicted that parts of the north-east between Leeds and Sheffield, and the coast will be amongst the warmest.
The Easter weekend is also set to be mostly dry with just a few pockets of rain throughout the weekend - mostly on Friday, in parts of northern Wales and the midlands.
Met Office Chief Meteorologist Paul Gundersen said: “The week will start off mostly fine, with temperatures reaching the low to mid-teens for most, while the nights will be cold with a chance of some overnight frost in places.
“The weather will be breezier and cloudier in parts of the northwest with some patchy light rain at times.”
