Remaining predominantly cold over the next few days.
This Evening and Tonight:
Mostly dry with variable cloud cover, though perhaps eastern counties most likely to remain overcast and damp at times. Given any cloud breaks, some frost is likely to develop. Minimum Temperature -2C.
A cold start, but any low cloud should lift, leaving sunny spells for the afternoon. A freshening southwesterly breeze may blow a few showers into western areas. Maximum Temperature 9C.
Outlook for Tuesday to Thursday:
Tuesday could start icy, with overnight wet and windy weather having cleared east. Then a day of blustery, occasionally wintry showers. Drier and brighter but cold thereafter, with night frosts.
Day 6 to 15
On Friday, southeastern areas are likely to stay dry, bright and cold, perhaps with some freezing fog patches at first. Elsewhere it could turn less cold as a band of rain and drizzle moves in from the west, with some hill snow possible in the north. However, there is a small chance that it could stay dry, bright and cold across much of the country with wintry showers in the east. Thereafter, an unsettled period of weather is possible with further band of rain moving southeast across the UK, with brighter and showery weather in between. Snow is also possible in some northern and central areas at times as it turns increasingly cold with overnight frosts, although some brief milder interludes are possible too.
Day 16 to 30
Changeable conditions are most likely at first, with spells of rain, strong winds and some snow at times. However, very cold conditions are more likely to develop through this period with a greater chance of northerly and easterly winds. This brings an enhanced risk of snow and widespread frosts, however there is currently a large amount of uncertainty. The driest and brightest weather is likely to be in the northwest. The conditions described above could still be interspersed by some milder and wetter interludes, most likely across southern parts of the British Isles, and this would bring a risk of significant snow and ice at times.
Met Office : SW : 2019-01-20T15:03:34