Weather in Greater London for September 2026
Until now, September 2026 in Greater London has been nearly identical to the historical average, with a temperature of 21.7 °C (showing only a slight deviation of 0.1 °C).
The forecast for the next days in Greater London predicts temperatures to be around 24 °C, close to the historical average.
In general, the average temperature in Greater London at the beginning of September is 23 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 23.4 °C by the end of September.
The climate of Greater London in September is notably wet, with an average of 11 rainy days, and a total of 69.6 mm of precipitation.
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Greater London Weather September
Temperatures trend during September in Greater London
September weather in Greater London day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Overcast | 22° /14° | 3.4 mm | 5 | |
| 2 Sept. |  Patchy rain possible | 22° /15° | 2 mm | 4 | |
| 3 Sept. | Light rain shower | 23° /15° | 1.6 mm | 5 | |
| 4 Sept. | Overcast | 22° /14° | 2.6 mm | 5 | |
| 5 Sept. | Patchy rain possible | 22° /14° | 1.8 mm | 5 | |
| 6 Sept. | Overcast | 25° /15° | 1.9 mm | 5 | |
| 7 Sept. |  Sunny | 25° /16° | 2.3 mm | 5 | |
| 8 Sept. |  Partly cloudy | 22° /15° | 6.3 mm | 5 | |
| 9 Sept. | Overcast | 22° /14° | 1.4 mm | 5 | |
| 10 Sept. |  Moderate or heavy rain shower | 22° /14° | 1.4 mm | 5 | |
| 11 Sept. | Patchy rain possible | 21° /13° | 0.8 mm | 4 | |
| 12 Sept. | Overcast | 21° /12° | 0.8 mm | 4 | |
| 13 Sept. | Patchy rain possible | 19° /13° | 3.5 mm | 4 | |
| 14 Sept. | Moderate or heavy rain shower | 21° /12° | 3.3 mm | 5 | |
| 15 Sept. | Patchy rain possible | 21° /13° | 0.1 mm | 5 | |
| 16 Sept. | Patchy rain possible | 20° /12° | 0.2 mm | 5 | |
| 17 Sept. | Patchy rain possible | 20° /12° | 1 mm | 4 | |
| 18 Sept. |  Cloudy | 21° /13° | 1.7 mm | 4 | |
| 19 Sept. | Partly cloudy | 21° /13° | 1.1 mm | 5 | |
| 20 Sept. | Overcast | 20° /15° | 0 mm | 3.2 | |
| 21 Sept. | Sunny | 23° /13° | 0 mm | 3.9 | |
| 22 Sept. | Sunny | 25° /16° | 0 mm | 3.8 | |
| 23 Sept. | Overcast | 24° /14° | 0 mm | 3.1 | |
| 24 Sept. | Sunny | 19° /11° | 0 mm | 5 | |
| 25 Sept. | Sunny | 20° /12° | 0 mm | 5 | |
| 26 Sept. | Overcast | 27° /13° | 0 mm | 7 | |
| 27 Sept. | Sunny | 22° /16° | 0 mm | 6 | |
| 28 Sept. | Sunny | 25° /16° | 0 mm | 6 | |
| 29 Sept. | Sunny | 26° /16° | 0 mm | 7 | |
| 30 Sept. | Overcast | 25° /19° | 0 mm | 6 | |
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Greater London in September - FAQ
What are the expected maximum and minimum temperatures in Greater London during September?
How much rainfall should be expected in Greater London during September?
What are the typical wind conditions in Greater London during September?
September rainfall patterns in Greater London
UV exposure in Greater London during September
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