London Weather in September
United Kingdom · September climate averages and travel tips
Avg high20°C (68°F)
Avg low11°C (51°F)
Rainfall49 mm (1.9 in)
RatingExcellent 9.5/10
Expect mild days in London in September: the average high is 20°C (68°F) and the average low is 11°C (51°F). September is autumn (fall) in United Kingdom. The month is fairly dry, with about 49 mm (1.9 in) of rain spread over 10 days, one of the driest months of the year. You get roughly 12.4 hours of daylight and frequently cloudy skies.
Is September a good time to visit London?
Yes — September is one of the best months to visit London. The weather rates excellent (9.5/10) on our comfort score.
September weather at a glance
| Average high | 20°C (68°F) |
|---|---|
| Average low | 11°C (51°F) |
| Daily mean | 15°C (59°F) |
| Rainfall | 49 mm (1.9 in) |
| Rainy days (1 mm+) | 10 |
| Humidity | 81% |
| Cloud cover | 67% |
| Daylight | 12.4 hours |
| Est. sunshine | 4.5 hours/day |
| Wind | 11.1 km/h |
| vs August | 2°C cooler than August, with 12 mm less rain. |
What to pack for London in September
- T-shirts plus a light layer for the evening
- a sweater for cool nights
- an umbrella or rain jacket
London weather in other months
Jan7°C / 2°C62 mmPoorFeb8°C / 2°C54 mmFairMar11°C / 3°C51 mmFairApr14°C / 4°C38 mmGoodMay17°C / 7°C57 mmExcellentJun21°C / 10°C57 mmExcellentJul23°C / 13°C57 mmExcellentAug22°C / 12°C61 mmExcellentSep20°C / 11°C49 mmExcellentOct16°C / 8°C76 mmGoodNov11°C / 5°C73 mmFairDec8°C / 3°C72 mmPoor
← AugustBest time to visit LondonOctober →
Nearby in September
- Bath19°C · 60 mm
- Birmingham19°C · 57 mm
- Bruges20°C · 59 mm
- Manchester17°C · 82 mm
- Saint Peter Port18°C · 55 mm
- Liverpool17°C · 84 mm
Where else is good in September? See where to go in September.