October in London averages a daily high of 15°C with nights around 5.3°C. Expect roughly 13.8 wet days totalling 81.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit London is May–September.
Based on LONDON CS, ON CA (8.7km), 1995–2024. 21 years of October data.