East Wales, central and eastern parts of England, along with eastern Scotland and eastern parts of Northern Ireland will have a mostly fine day with plenty of sunshine.
West Wales, the west of Northern Ireland, along with northwest England and the north and west of Scotland can expect to see a mix of sunshine and showers.
Some of those showers heavy with thunder, and possibly even turning wintry over the Scottish mountains.
Meanwhile the far south of England will have a rather cloudy day with some patchy light rain or drizzle. Top temperature 13 Celsius (55F).