Sunday
Ireland and Scotland will be cloudy with outbreaks of light rain, occasionally heavy over Scotland's west coasts. Some patchy rain my drift inland to central areas and the Southern Uplands. Further south, it will be mostly dry and bright with sunny spells, though there's a chance of some light rain over northwest England. Sun may be quite extensive in southern England. Highs of 18C in the south, 14C in the north, some southeast areas reaching near 20C.

Sunday Night
Further outbreaks of rain will drift into northwest Scotland, chance for brief heavy spells. Some rain may reach the western counties of Ireland as well. A mild breeze into Scotland and Ireland as well. Mostly dry elsewhere with clear spells and light or calm winds. Minimum temperatures at 7 to 8C England, nearer 10C Scotland and Ireland.
 

Monday
High pressure over the Low Countries will bring mostly dry but rather cloudy conditions to the British Isles. Best of sun in the central and southern England. Rain will linger in northern Scotland through the day, perhaps persistent with heavy spells along the west coast. A notable mild breeze in the west and north. Maximum temperatures of 21C in the southeast, 17C in the north.

Tuesday
A largely dry day with a mix of cloud and sun for most. If any, a few isolated drizzly showers drift around Scotland. Ireland will be cloudier but stay dry. High temperatures reaching 23C in the south and 18C in the north.