Tuesday could end up feeling like the coldest day of the week in what is a “real mishmash” of weather across the country.
Temperatures plummeted well into single digits overnight as frosts set in – while an icy north westerly breeze will blow in showers throughout the day.
The cold snap could grow milder as the week progresses before dipping again, all in preparation for a 1,000 mile-wide “Norwegian barrage”.
That front threatens to thrust Britain into an early winter by next month with temperatures as low as -10C in Scotland, according to reports.
The Environment Agency has issued two flood alerts for England across the Midlands for Tuesday – which is actually the area of the country most likely to stay dry and bright.
Met Office forecaster Alex Deakin said: “It’s going to feel cold most days this week but probably particularly cold on Tuesday thanks to a brisk and fresh wind blowing.
“That wind will also bring quite a few showers across the country but not everywhere seeing the showers.
“Some places will avoid them and stay largely dry and bright.
“It’s quite a complicated, messy picture,” he added.
Overnight, showers have battered Northern Ireland, Wales and western parts of England, while rural areas have been well down into the single digits.
Mr Deakin said a “zone of wet weather” will spiral into parts of north east England and south east Scotland where “it could be a very wet day”.
In the afternoon, another wet zone is set to arrive into East Anglia and the south east.
BBC forecaster Louise Lear said: “I can offer you something a little bit more optimistic.
“It does look as though it will be predominantly drier and brighter as we head into the rest of the week and then gradually it will continue to feel on the chilly side.”
Referring to next month, Weather Outlook’s Brian Glaze said: “-10C is expected in Scotland and -7C in England by late November, with snow on Scottish mountains now, in northern England from early November and the South at risk from late November.”
UK 5 day weather forecast
Northwestern parts fine with some sunshine after early showers clear. Many other areas rather cloudy and on the cold side. Eastern areas seeing rain at times, particularly in northeast England, whilst south and southwestern parts seeing some heavy showers.
Rain in eastern parts gradually moving west and easing, with much of west Scotland staying dry. Clearer skies developing from the east but with brisk winds, not feeling too cold.
Windy with showers for eastern areas in particular, some western parts likely dry, particularly to the lee of mountains. Still chilly along exposed coasts thanks to the strong northeasterly winds.
Outlook for Thursday to Saturday:
A fairly quiet spell of weather, mostly dry with sunny spells. Best of the sunshine in the west, a few showers mainly in the east. Rather cold, with light winds.