London Weather October 2025. All times are british summer time (europe/london, gmt+1) unless otherwise stated. Get the monthly weather forecast for london, london, united kingdom, including daily high/low, historical averages, to help you plan ahead.

Expect 15°c daytime maximum temperatures in the shade with on average 3 hours of sunshine per day in london in october. 16:00 (utc+1) on fri 18 oct 2025.