Sunday
An Atlantic low pressure system approaches Ireland from the southwest on Sunday. Patchy rain increasingly drifting into central Ireland, some extended spells with heavier bursts increasingly forming in the west. A few patches may reach southwest England and Wales later. Otherwise a dry day for most of Britain and Northern Ireland; sun through high cloud for most and feeling rather warm and humid. Some light showers in north Scotland. Warmest south and east, highs at 27 to 30C, to 24 to 26C central England and Wales. Eastern Ireland and Scotland approaching 19 to 21C, western parts only reaching 16C.

Sunday Night
Showery rain will continue to affect Ireland overnight with some heavier bursts beginning to form. Rain also increasingly forming in southern Scotland and northern England, a few patches drifting northward here and there. Drizzly patchy rain starts to affect southwest England and Wales. The rest of England stays dry, the best of clear skies to the east. Lows of 11 to 13C, up to 15C in east England.

Monday
A complex and shallow area of low pressure lingers just southwest of Ireland, bringing rain and heavy showers, a risk of local thundery downpours: Ireland, southwest England and Wales into southern Scotland are indicated to see most outbreaks of rain. A drier, brighter day in the east of England, but the rain is likely to move eastwards into the evening and night with some downpours possible for eastern and northern England. Feeling humid once again. Highs to 33C south, 20 to 23C northern England and Ireland, nearer 16C Scotland.

Tuesday
Tuesday continues to bring outbreaks of heavy, thundery rain to Scotland, northern England, and Ireland. A brisk easterly will blow across Scotland. Starting driest across England, particularly in the east. However, afternoon brings an increased risk of afternoon showers, most areas at risk, but local bright drier windows, the southeast staying driest. Highs at 16 to 31C.