London Weather in September
United Kingdom · 30-year monthly averages
🌟 Great time to visit
September in London is pleasantly warm, with average daytime highs around 20°C (68°F) and nighttime lows near 12°C (54°F). Expect roughly 50mm of precipitation spread over about 9 rainy days, with little rainfall.
Avg high
20°C
68°F
Avg low
12°C
54°F
Rainfall
50mm
dry
Rainy days
9
days with ≥1mm
🎒 What to pack
- light layers
- comfortable walking shoes
September vs the rest of the year
FAQ
- How hot is London in September?
- September in London is pleasantly warm, with average daytime highs around 20°C (68°F) and nighttime lows near 12°C (54°F). Expect roughly 50mm of precipitation spread over about 9 rainy days, with little rainfall.
- Does it rain a lot in London in September?
- London sees around 50mm of precipitation in September on average — dry by global standards.
- Is September a good time to visit London?
- September is one of the best months to visit London — comfortable temperatures and manageable rainfall.