The Met Office is also forecasting gale-force winds in the West as a five-day freeze from Icelandic air chills the UK.
Thursday night and Friday morning will be particularly cold, where large areas of the country will dip into sub-zero temperatures.
But in some especially cold places, the mercury could fall breathtakingly low.
Craig Snell from the Met Office told The Sun Online: "There's probably scope that it could come down to about -6C and -7C in the real countryside areas like the high ground of the Pennines and some of the glens of Scotland.
"For most of the public, we're looking at falling just below freezing so the main towns and cities will be at 0C or -1C, the suburbs -2C or -3C, and then a few spots around -4C and -5C and then the odd spot at -7C."
SPONSORED: Save £100s off your energy bill every year
Switchcraft finds the best deal for you – and continues to switch you on to cheaper deals, so you never have to do it yourself.
- Sign up to Switchcraft for free and get £5 cashback – here.
£5 cashback is paid into your bank account within 4 months of completing the switch. Pre-paid meter customers will receive a £5 Amazon voucher. Promotion ends 31/12/18. Open to those aged 18 and over. UK residents only. Click here for full T&Cs.
NewsUK has a brand partnership with Switchcraft.
And following the freeze, the North could be in for some snow showers when the weekend arrives.
Patches of snow and sleet are expected to descend across the Pennines.
Craig explained: "I'd say it's probably going to be more of a problem for the higher level, like the transpennine route for example – I think at lower levels it will be a cold, wet morning with sleety snow mixed in for good measure."
Gale force winds are also expected to lash the West coast of Britain on Thursday when gusts could reach 50mph.
Craig added: "The main thing the wind will do is enhance the cold feel.
"Temperatures on thermometers will be about four or five degrees, but factoring in that wind on Thursday and it will be feeling more like one or two degrees.
Thursday is definitely a day for wrapping up warmly."
The next few days will be fairly cold but mild for most in the East as spells of rain fall on the West.
Showers pushing in from the Atlantic will make it a wet and windy week in the West however, particularly on the coast of Scotland, Northern Ireland, Cornwall and Devon.
Source: Read Full Article