Wednesday
Outbreaks of showery rain, in places heavy and thundery, will push northwards up through England, Wales, Ireland and Northern Ireland today allowing for drier conditions and slow developing sunny spells to develop behind. Mostly dry across Scotland though by late afternoon showery rain will reach the southwest, heavy and potentially thundery in places by evening. Another warm and muggy day with highs at 21 to 27C for most, cooler across Northern Ireland and much of Scotland.

Wednesday Night
Spells of heavy rain push north into southern England including Wales overnight. By dawn the rain will move into central western parts of England. A few scattered showers further north with some rain affecting western Scotland, however, most will stay dry. Lows at at a muggier 14 to 19C through England and Wales, 11 to 15C further north and west.
 

Thursday
The rain will continue to push northwards through Thursday clearing much of southern England by late morning. Eastern regions of Ireland as well as parts of Northern Ireland will see spells of rain, often heavy, thoughout the day. The rain will move into the Wales and central England through the afternoon reaching the Borders by evening. Staying largely dry further north throughout with the best of the sunshine in the far north. Highs at 26C in the sunshine in East Anglia, 21C in Ireland, 19C in western Scotland.

Friday
Low pressure drifts over Scotland on Friday. Showers in central and eastern Scotland with a line of showers through northern England and Wales as well as southwest England. Brighter spells and fewer showers in central and eastern areas. Sunny spells and scattered showers for Ireland and Northern Ireland. Highs at 16C in northern Scotland, 24C in central England.