Showers along the south coast tonight, spreading inland on Wednesday.
This Evening and Tonight:
Some showers are likely to affect southern coastal parts overnight. Elsewhere it should remain mostly dry, but under clear skies, especially in the west, it will turn cold with frost in places. Minimum Temperature -2C.
After a bright start, the coastal showers should spread further inland through the day, some turning heavy and perhaps thundery. Less cold than Tuesday but winds strengthening later. Maximum Temperature 10C.
Outlook for Thursday to Saturday:
Thursday starts cold but bright, otherwise fairly cloudy Friday and into the weekend with further showers likely. Overnight frost and ice at first, but gradually becoming less cold.
Day 6 to 15
On Sunday, showers will continue near eastern coasts, though these will probably die out later. Most other areas will stay rather cloudy with relatively light winds. In the last few days of November, skies will often be fairly cloudy, with the likelihood of some showers, which may bring hill snow to the north of the UK. There will be sunny spells too, although the breeze will make for a marked wind chill at times. It will stay on the chilly side, with patchy frost or ice likely at night. Into early December, there is a lot of uncertainty in the forecast, as there is the chance of either a short-lived milder spell with winds from the west, or perhaps colder weather if the winds turn more northerly or northeasterly.
Day 16 to 30
Through this period, there is likely to be a continuation of cold and mainly dry weather for much of the UK, with sunny spells and a few showers. However, there is a chance that during early December the weather pattern may change temporarily, with fronts moving in from the west across the Atlantic. This would bring longer spells of rain, interspersed with brighter, showery interludes, and it would also become less cold. However, even if this change does happen, it won't be long before we have more settled weather again, perhaps by the middle of December. This would mean a return to colder conditions, with overnight frost and fog more likely.
Met Office : SW : 2018-11-20T14:05:21