Sunday
Pressure stays low through Sunday. Periods of rain through Northern Ireland and much of northern England and Scotland, most of this showery. Drier for northwest Scotland with sunny spells. Patchy rain in England, mostly south, then later a front moves in from the west, brining a broader area of rain across Wales and into western parts of England, trending patchier as it reaches the east later in the day. Turning bright in Ireland and southwest England later. Highs at 8 to 10C in central and south England, 6 or 7C in the north.

Sunday Night
Often clear skies in Ireland overnight, some light patchy rain on northwestern coasts. Cloudier in Britain but often dry in western areas, only local light spots of rain. Wetter in the east, particularly southeast England and eastern Scotland, where rain may linger for several hours and heavy at times. Light wind most of the night. Lows of 2 to 4C for many, but cooler in Ireland, Wales, and parts of central/southwest England, where frosts are possible.

Monday
Low pressure southwest of the British Isles on Monday. Some bright skies in central areas to start the day but trending generally cloudy with time. Showery rain affecting east Scotland regularly, falling as snow in upland areas. Rain arrives into southwest England and Ireland on a warm front, brining extensive rain to these areas which may be heavy along the coasts; a risk of flooding returns here. Wind widely strengthens too. Highs at 6 to 9C for most, through nearer 4C Shetland Islands.

Tuesday
Low pressure south of the British Isles on Tuesday. Rain through southern parts of Ireland England and Wales, which may spread into central areas too. A constant stream of snow into upland eastern and northern Scotland, increasingly falling to lower elevations. Northwest England and west Scotland will be driest, a few bright spells possible but mostly cloudy. Wind remains strong as well. Highs at 9C in the far south of England, 3C in northern Scotland and around 4 or 5C for most.