Met office
UK Outlook for Wednesday 21 Nov 2018 to Friday 30 Nov 2018:
The remainder of November looks most likely to be characterised by winds blowing in from continental Europe across much of the country. This will bring variable and often large amounts of cloud, with the best of any sunshine in western areas. There is also the likelihood of some showers, these most likely focussed across eastern areas, but perhaps becoming more widespread and persistent at times. With a relatively chilly air mass in place, there is scope for some sleet or snow, but this will most likely be restricted to higher ground. The breeze will make for a marked wind chill at times in the south. With lighter winds further north, and under clear skies at night, overnight frosts are likely to become rather more extensive.
UK Outlook for Saturday 1 Dec 2018 to Saturday 15 Dec 2018:
This period is likely to begin with a continuation of cold conditions for much of the country. There is a small chance that during early December, the weather pattern may change, with fronts moving in from the Atlantic, bringing rain, interspersed with brighter, showery interludes and also less cold weather. However, should this come off, then this change will likely be short lived, with more settled conditions becoming re-established by the middle of December. This would mean a return to increased incidences of overnight frost as well as the risk of fog.
Originally Posted by: Gavin D