Largely dry, some brighter spells, but cloud gradually thickening. Cold.
Cold, frosty start possible for some eastern parts, whilst cloudier skies are likely in the west. A dry day follows, with variable amounts of cloud and further sunny spells. Maximum Temperature 5C.
Clear skies are likely across southeastern parts, leading to an early frost. However less cold, with cloudier skies elsewhere. These gradually spreading to all except the far southeast by dawn. Minimum Temperature -4C.
Largely cloudy morning, away from the cold, frosty southeastern corner. Some sunny spells developing, but staying rather cold with a strengthening breeze. Maximum Temperature 6C.
Outlook for Tuesday to Thursday:
Rain overnight, perhaps turning to sleet briefly, then clearing to sunshine and isolated wintry showers Tuesday. Staying cold Wednesday and Thursday, with sunny spells, further isolated showers, and overnight frosts.
Day 6 to 15
Thursday and Friday will see a very cold north to north-easterly airstream bringing sunshine and showers, the showers giving rain or snow and most frequent in the north and northeast. It looks breezy on Thursday perhaps with coastal gales in the south and east, although winds should ease on Friday. Widespread locally severe night frosts are also likely. Later on Friday, rain preceded by snow may arrive in the far west and northwest, accompanied by strengthening winds. During the weekend and following week a lot of fine weather is expected with the chance of some wintry showers. Staying cold or very cold, with widespread frost. However, some wet and windy weather is likely in the northwest, which may briefly spread further southeast giving some snow on encountering the colder air.
Day 16 to 30
The northwest of the British Isles may see changeable conditions at first, with spells of rain, strong winds and some snow at times. However, it should become drier, brighter but colder here as the period unfolds. Meanwhile further southeast some bright, quiet periods are expected but with some wintry showers too, the detail of which is very uncertain. It is likely to be cold or very cold, and as a result widespread, locally severe frosts are on the cards. The conditions described above could still be interspersed by some milder, wetter interludes, most likely across southern parts of the British Isles, and this would bring an associated risk of significant snow and ice at times.
Met Office : SE : 2019-01-20T01:47:02