TEMPERATURES are set to dunk to -4C tonight because blasting of freezing Scandinavian air sets in Britain in a bitter cold.
Mercury is set to sink below zero in Inverness and Teeside – before we end up even further until Wednesday night.
Scotland will dive to -5C in places, while the northeast can hit -2C.
Later in the week the day temperatures will be as low as 5C, but the windchill factor makes it feel more like freezing.
Overtemperature becomes even colder.
An east wind winds down temperatures – even running Reykjavik (5C), experts said.
The November average for England and Wales is 10C.
Some heavy showers are likely to be snowing over central and eastern areas, including Lincs and Chilterns.
With Office Office Forecasts Steven Keates said: "Things will get colder when we go into the week.
"The temperature on Wednesday will be down to 5C, but the windchill factor will make it feel closer to freezing.
"It will feel pretty raw. It will be the kind of wind blowing through you instead of rounding you.
"It will be quite shock to the system."
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The expected snowfall is unlikely to accumulate or cause any major travel breaks, he added.
But the cold weather is likely to remain all week and next weekend, with the risk of additional snow villages.
Keates added: "It does not feel very nice out there. It is typically cold near winter weather with frost and ice overnight."
Britain suffered from the worst snow storms for 30 years last winter.
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The temperature was below average for each month from January to March.
The animal from the east and the storm Emma violated the country for days.
The roads were blocked, train services axled and flights landed.
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