Cloudy and wet at first, with heavy, perhaps thundery rain in places. Brighter conditions will develop around lunchtime, though further thundery showers are possible this afternoon. Very warm and humid. Maximum temperature 27 °C.
Tonight:
Showers easing this evening, leaving a dry but muggy start to the night. Further rain and thunderstorms are likely to reach the south by dawn. Minimum temperature 16 °C.
Thursday:
Heavy rain and thunderstorms will continue moving north through the day, with a risk of localised flooding. Drier, brighter conditions will spread into the south later. Maximum temperature 24 °C.
Outlook for Friday to Sunday:
Remaining unsettled through Friday and the weekend, with further rain and showers, heavy and perhaps thundery at times. Some drier and brighter spells also developing. Temperatures near average.
Updated:
UK long range weather forecast
An unsettled period is likely, with showers or longer spells of rain possible across many parts of the UK. Some heavy rain is likely, perhaps with some thunderstorms too. Rainfall amounts will probably be above average for the time year and there is potential for some strong winds at times. Some drier and more settled interludes could develop at times, but these will likely be short-lived. Temperatures are likely to be near average, although some short-lived warm or very warm spells are possible, especially in the south.
Updated:
Most likely a continuation of the generally unsettled conditions at first with showers or longer spells of rain across many areas, perhaps heavy and thundery in places. However, there may still be some brief drier interludes at times. Further into September, drier weather may become more prevalent, especially in the south and southeast, with any more unsettled conditions tending to become more likely further north and northwest. Temperatures will probably be near normal at first but may become warmer later, with the possibility of some hot spells in the south.