Met office
UK Outlook for Saturday 19 Jan 2019 to Monday 28 Jan 2019:
Outbreaks of rain, sleet and some snow are likely to move slowly south and eastwards on Saturday, but tending to become lighter and more patchy as it does so. Sunday looks generally quiet, with a good deal of dry and bright weather. Thereafter, it looks set to remain mainly on the cold side, but also unsettled and sometimes windy, with gales possible in the north. Any milder spells will tend to be brief, and associated with longer spells of rain. The rain could turn to snow at times, particularly across northern, central and eastern areas, especially later in this period. Some drier, brighter spells are likely, perhaps with snow showers, during such spells, frost could become widespread and severe.
UK Outlook for Tuesday 29 Jan 2019 to Tuesday 12 Feb 2019:
For the end of January and into early February, there is an increased likelihood of colder weather being established across the UK, with temperatures continuing a downward trend. This would bring a greater risk of snow, ice and widespread frost, particularly across northern parts of the country. However, there remains uncertainty over the extent of the cold weather and how long it will last, and it is still possible that some milder and wetter interludes will intersperse this generally cold period, especially in the south.
https://www.metoffice.gov.uk/public/weather/forecast
Originally Posted by: Gavin D