London weather in September
London in September averages 16°C (60°F), 51 mm of rain and 5.1 hours of sun a day.
Of the twelve months in London, September is the fourth warmest, the sixth wettest and the sixth sunniest.
- Average temp
- 16°C (60°F)
12–20°C · 53–68°F
- Rainfall
- 51 mm
Showers likely
- Sunshine
- 5.1 h
hours per day
What is London like in September?
Daytime
Days are mild.
Rain
Some rain is likely; pack for showers.
Evening
Evenings are cooler. A layer helps after sunset.
What should I pack for London in September?
A light rain jacket
About 51 mm falls this month — showers rather than washouts.
A warm mid-layer
Nights drop to around 12°C (53°F).
September compared with August and October
September in London is 2.8°C cooler than August and about as wet as it, which averages 19°C (65°F).
September in London is 3.5°C warmer than October and 14 mm drier than it, which averages 12°C (54°F).
Daylight in London in September
On 15 September the sun is up for 12 hours 38 minutes in London, rising about 06:36 and setting about 19:14 local time.
September ends 1 hour 53 minutes shorter than it begins, so the last week of the month is a different length of day from the first.
That is 3 hours 59 minutes short of June, the longest-lit month here.
Where to stay in London
Dates are a starting point for September.
Travel guides for London
What to read before you book.
London weather by month
TemperatureRainfall
How September compares with the rest of the year
September is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | 6°C / 42°F | 59 mm |
| February | 6°C / 43°F | 45 mm |
| March | 8°C / 46°F | 38 mm |
| April | 10°C / 51°F | 43 mm |
| May | 14°C / 56°F | 46 mm |
| June | 17°C / 62°F | 47 mm |
| July | 19°C / 66°F | 46 mm |
| August | 19°C / 65°F | 53 mm |
| September | 16°C / 60°F | 51 mm |
| October | 12°C / 54°F | 64 mm |
| November | 8°C / 47°F | 67 mm |
| December | 6°C / 43°F | 57 mm |
Similar weather in September
Other destinations whose September averages sit close to this one.
Check another month
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FAQs about London in September
September climate averages for London, 1991–2020.
London averages 16°C (60°F) in September, ranging from about 12°C (53°F) at night to 20°C (68°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Some. About 51 mm falls across September, enough to need a light jacket but not enough to reshape a trip.
Yes. September averages 16°C (60°F) against 12°C (54°F) in October — 3.5°C warmer.
September is 2.8°C cooler than August, and about as wet.
Yes. September falls inside the most comfortable stretch of the year here, May to October, on temperature and rainfall together.
About 5.1 hours of sun a day on the 1991–2020 average.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what September is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 12 hours 38 minutes of daylight in mid-September, against 16 hours 37 minutes in June and 7 hours 52 minutes in December.
On 15 September, sunrise is about 06:36 and sunset about 19:14 local time. Both shift across the month — the month ends 1 hour 53 minutes shorter than it starts.
