Dry and very cold with widespread frost.
This Evening and Tonight:
Tonight will be dry with clear spells and some patchy areas of cloud, especially across southern parts of Devon and Cornwall. A widespread frost will quickly develop as temperatures plummet under clear skies. Breezy, particularly on the south coast. Minimum Temperature -3C.
Dry and largely sunny on Sunday, although perhaps some patchy cloud in the far southwest at times. Feeling bitterly cold with a strong easterly wind. Maximum Temperature 5C.
Outlook for Monday to Wednesday:
Even colder next week, with an increasing risk of snow showers, especially through Tuesday and Wednesday. Snow accumulations locally disruptive and feeling raw in easterly winds. Severe frost overnight.
Day 6 to 15
March will begin very cold with sunshine and snow showers, these continuing to bring some accumulations especially across eastern parts. Friday could see heavier and disruptive snow developing across southern and some central areas, combined with strong to gale force easterly winds, leading to blizzard conditions. However, there is a lot of uncertainty with this. Thereafter, it is likely to remain very cold through early March with further snow showers in the east and southeast. The best of the sunshine is likely in the west, but all areas will feel bitterly cold in strong winds with a significant wind chill. Overnight frost will be widespread and severe in places. At times, it may turn more unsettled and less cold across the west and southwest.
Day 16 to 30
The start of this period is likely to remain very cold across much of the UK, with bitterly cold easterly winds giving a significant wind chill. There will continue to be a risk of snow across southern, eastern and some central areas, but in the north and west it should be drier. Frosts will continue to be widespread and severe in places. As we head towards the middle of March it may turn more unsettled and less cold with milder and wetter weather spreading up from the south or southwest. This may lead to further significant snow in places although this remains very uncertain. Northern areas may hang on to the colder weather well into March.
Met Office : SW : 2018-02-24T15:19:54