London Weather in September
19.2°C high · 10.5°C low · 58 mm rain · 4.8h sun
Sep is a warm month in London — not peak season, but a good time to avoid crowds.
September at a glance
| Metric | Value |
|---|---|
| Average high | 19.2°C |
| Average low | 10.5°C |
| Rainfall | 58 mm |
| Sunshine | 4.8 hours/day |
| Daylight | 12.4 hours |
What to pack in September
Pack a jacket and layers for London in September.
London weather by month
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Frequently asked questions
What is the weather in London in September?
Highs of 19.2°C and lows of 10.5°C, with about 58 mm of rain and 4.8 hours of sunshine per day.
Is September a good time to visit London?
Sep is a warm month in London — not peak season, but a good time to avoid crowds.
What to do in London · Best time to visit London
Climate data: Open-Meteo Historical (ERA5), 1991–2020. CC BY 4.0.