Sunday 10 Jan - Tuesday 19 Jan
Sunday begins with a band of cloud and patchy rain pushing in southeast across Scotland. Brighter and colder conditions follow to the far northeast of Scotland and Northern Isles, though further wet weather is likely later. Into Monday, high pressure to the west will decline allowing Atlantic frontal systems to bring in milder conditions, with temperatures closer to the average for this time of year, though further wintry hazards across the far north. Then past Wednesday, as this high pressure develops to the southwest of the UK, mobile and cyclonic northwesterly flows bring unsettled conditions with outbreaks of rain and, at times, strong winds as well as occasional colder temperatures. Drier, more settled conditions are then probable across the south of the UK, with frost and fog fairly prevalent.
Tuesday 19 Jan - Tuesday 2 Feb
Confidence for this period is low, though there is a signal for Atlantic mobility to weaken which perhaps allows conditions, at least in the north, to become drier and for temperatures to be closer to average. However, there is still a chance of cold air outbreaks in the north as flow across Scandinavia pushes across the North Sea. This would confine more unsettled conditions to the south, as well as milder than average temperatures. Further, this boundary between the cold and milder conditions could also allow for some significant snowfall where the two air masses.
https://www.metoffice.gov.uk/
Originally Posted by: Gavin D