All Regions Europe Grim London weather forecast for September as 4 days of rain and thunder to hit The sun will be hiding between clouds for much of the week My London – WeatherRead More About Author OTW Observer See author's posts Post navigation Previous The First Labor Day ParadeNext BBC Weather verdict on date it will be sunny again in London after 4 days of rain and thunder Related Stories London warning of ‘extreme’ wildfire risk this weekend as 31C heatwave continues All Regions Europe London warning of ‘extreme’ wildfire risk this weekend as 31C heatwave continues July 10, 2026 Exact dates BBC Weather experts are forecasting 3 days of London thunderstorms after heatwave All Regions Europe Exact dates BBC Weather experts are forecasting 3 days of London thunderstorms after heatwave July 10, 2026 UK heatwave to last longer than expected as Met Office reveals when London will cool down slightly All Regions Europe UK heatwave to last longer than expected as Met Office reveals when London will cool down slightly July 9, 2026