London Weather In September 2024. Maps show a heatwave sweeping the country at the end of the eighth month of the year and into the beginning of september. The latest sunset is 7:45 pm on september 1 and the earliest sunset is 1 hour, 6 minutes earlier at 6:39 pm on september 30.
So in conclusion, september could be quite an unsettled, cloudy but humid month with average rainfall and temperatures. September weather for london, united kingdom: