Saturday
Largely dry with a good amount of bright sunshine. Thicker cloud toward western Scotland and Northern Ireland may produce an area of rain or sleet for a few hours. A brisk northerly wind brings a scattering of snow showers to North Sea coasts of England. Lighter winds elsewhere, but a cold day for all, frost lasting all day out of sunlight. Temperatures will struggle to climb above freezing in northern areas, highs 3 or 4C in Midlands, 6C in south.
Saturday night
Risk of patchy drizzle in the evening and overnight for north-west England, north Wales, also parts of Northern Ireland & south-west Scotland, falling as light snow over the hills, perhaps to quite low levels away from the coast. Dry elsewhere. Clear skies for much of Scotland, central & eastern England will allow widespread frost, lows 0 to -2C in towns, to -5C or lower in some rural areas. Less cold beneath thicker cloud in the west, nearer 2C.
Sunday
High pressure to the south & east, and fronts toward the west. A good amount of sunshine for central and eastern Britain, but high level cloud slowly thickens from the west. Much more cloud across western Britain, and quite murky toward the north-west, with intermittent drizzle, or light snow over the hills. Rain develops across western Ireland as a southerly breeze freshens, and toward evening likely reaching Cornwall. Daytime highs 1 to 5C.
Monday
A murky, cold day as fronts encroach slowly in from the Atlantic. Grey skies and outbreaks of rain or sleet across Wales & the west, also Ireland. Drizzly and damp conditions may also reach central Britain, but drier in the east & north-east. A little wet snow possible over hills. Some lingering fog and frost in the east. Hill fog in west & north. Daytime temperatures 2 to 5C, rising toward 7C in far south-west.