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 Weather forecast during London Tube strikes – can I cycle to work? All Regions Europe Weather forecast during London Tube strikes – can I cycle to work? April 20, 2026 Exact date 20C heat will hit London in new forecast All Regions Europe Exact date 20C heat will hit London in new forecast April 20, 2026 Lyrid meteor shower 2026 best time and chances to see in London All Regions Europe Lyrid meteor shower 2026 best time and chances to see in London April 17, 2026