Weather In London In September 2024. A ‘plume of rain ’ is headed towards us, as the weather makes a handbrake turn from one of the hottest days ever recorded in the uk. The temperatures in london in september are usually low and can range between 53°f and 66°f.
In city of london during september average daily high temperatures decrease from 69°f to 63°f and the fraction of time spent overcast or mostly cloudy increases from 47% to. Monday was the hottest day.