Brisk and cool westerly winds affect the British Isles. Low pressure to the north sends a frontal system across the country which brings widespread rain and hill snow to Scotland, heaviest in the west. Showery in western England and Wales, with some organised showers possible for Northern Ireland too. Largely dry for central and eastern England with some sun. A front over southern counties brings cloud and possibly some light rain or drizzle. High temperatures at 6 to 11°C.
An area of rain arrives from the southwest through Saturday night spreading across Ireland, Wales, southern and central England and into Northern Ireland through the early hours of Sunday. A few showers affect northeastern parts of Scotland but otherwise it's a dry night there with the best of any clear skies. Overnight lows at -1 to 2°C under these clear skies in Scotland, 3 to 7°C for most other places.
A spell of rain sweeps east across England and Wales in the early hours, perhaps continuing to affect East Anglia and the southeast into the morning, clearing to showers for the southwest. A front may trail back across northern England, parts of the Midlands and Wales, plus Ireland, where patchy rain and low cloud may persist. Rain reaches southwestern Scotland later in the morning and spreads northeastward across the country, readily turning to snow over higher ground. Highs at 4 to 13°C.
Pressure stays generally low on Monday. Another front may extend across southern areas, bringing cloud and light rain to parts of England and Wales. Rain clears to showers for northern areas, again these wintry over the mountains. A lot of cloud around though there will be some sunshine, especially for eastern areas. Mild in the south, cooler north with high temperatures between 5 and 10°C.