Tuesday
Extensively cloudy skies with rare sunshine, mist and fog for some. Areas of rain across Britain, but amounts will vary with some places more often dry. Thunderstorms initially more concentrated over northern England increasingly forming across central and southern England, around the Home Counties and into East Anglia, perhaps also south Wales - some intense downpours in places. Persistent heavy rain toward northeast Scotland. Drier for western Scotland, Northern Ireland and Ireland, though breezy and quite cool here. Highs 17C north to 24C south and 28C in the southeast.

Tuesday night
Overnight, drier through most of Scotland, Northern Ireland and Ireland with clear skies across western regions here. Showers throughout England and Wales, some heavy and likely to be thundery with low cloud and mist forming for some. Lows at a cool 6 to 10C across Scotland, 11 to 16C elsewhere.
 

Wednesday
A front affects southern and central England and Wales with cloud and outbreaks of rain, before slowly retreating to the south and southeast. Some heavy and possibly thundery bursts locally in the southeast. A ridge of higher pressure builds into Ireland and Scotland bringing drier conditions here with some sunny spells, these edging southwards during the day. An Atlantic front approaches the far west of Scotland and Ireland later. Highs 20 to 23C in the south, 16 to 19C in the north.

Thursday
A frontal system continues to move into west and northwestern areas. Patchy rain and a few showers for Scotland, Ireland and western parts of England and Wales. Fair elsewhere across England and Wales with sunny spells. Perhaps some cloud and patchy rain close to the coasts of East Anglia early in the day. Highs 23 to 26C in central and southern Britain, 16 to 19C for Scotland and Northern Ireland.