East Sussex
September
Weather in East Sussex for September 2025
Your guide to East Sussex weather in September - trends and predictions
In general, the average temperature in East Sussex at the beginning of September is 20.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.7 °C by the end of September.
The climate of East Sussex in September is notably wet, with an average of 11 rainy days.
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19
Dry days
11
Rainy days
0
Snow days
20°/15°
Temperatures
25 km/h
Avg max wind
78 %
Avg humidity
East Sussex in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  21° | 2 20° | 3  20° | 4  20° | 5 20° | 6 21° | 7 22° |
| 8 21° | 9 21° | 10 21° | 11 18° | 12  18° | 13 17° | 14 17° |
| 15 19° | 16 20° | 17  19° | 18  20° | 19 19° | 20  19° | 21 18° |
| 22 17° | 23 17° | 24 17° | 25 17° | 26 18° | 27 16° | 28 16° |
| 29 16° | 30 17° |
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Temperatures trend during September in East Sussex
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Light rain shower | 21° /16° | 14.6 mm | 5 | |
| 2 Sept. | Patchy rain possible | 20° /16° | 0.8 mm | 5 | |
| 3 Sept. | Partly cloudy | 20° /14° | 0.4 mm | 6 | |
| 4 Sept. | Sunny | 20° /14° | 2.7 mm | 5 | |
| 5 Sept. | Partly cloudy | 20° /15° | 10.6 mm | 5 | |
| 6 Sept. | Sunny | 21° /17° | 7.9 mm | 6 | |
| 7 Sept. | Partly cloudy | 22° /16° | 1 mm | 6 | |
| 8 Sept. | Partly cloudy | 21° /16° | 2.2 mm | 5 | |
| 9 Sept. | Sunny | 21° /15° | 0.1 mm | 5 | |
| 10 Sept. | Partly cloudy | 21° /15° | 1.9 mm | 6 | |
| 11 Sept. | Sunny | 18° /13° | 0.1 mm | 5 | |
| 12 Sept. | Overcast | 18° /11° | 0.4 mm | 4 | |
| 13 Sept. | Overcast | 17° /11° | 0 mm | 5 | |
| 14 Sept. | Partly cloudy | 17° /11° | 0 mm | 5 | |
| 15 Sept. | Sunny | 19° /13° | 0 mm | 6 | |
| 16 Sept. | Sunny | 20° /14° | 0 mm | 6 | |
| 17 Sept. | Light drizzle | 19° /14° | 0.6 mm | 4 | |
| 18 Sept. | Patchy light rain with thunder | 20° /15° | 3.1 mm | 5 | |
| 19 Sept. | Light rain shower | 19° /16° | 1.5 mm | 5 | |
| 20 Sept. | Moderate rain | 19° /15° | 8.5 mm | 5 | |
| 21 Sept. | Light rain shower | 18° /14° | 6.6 mm | 5 | |
| 22 Sept. | Light rain shower | 17° /13° | 4.6 mm | 4 | |
| 23 Sept. | Partly cloudy | 17° /12° | 0.7 mm | 5 | |
| 24 Sept. | Partly cloudy | 17° /14° | 0.6 mm | 5 | |
| 25 Sept. | Patchy rain possible | 17° /14° | 5.1 mm | 4 | |
| 26 Sept. | Light rain shower | 18° /14° | 7.5 mm | 4 | |
| 27 Sept. | Partly cloudy | 16° /12° | 10.8 mm | 4 | |
| 28 Sept. | Patchy rain possible | 16° /10° | 0.1 mm | 4 | |
| 29 Sept. | Light drizzle | 16° /11° | 1.4 mm | 4 | |
| 30 Sept. | Partly cloudy | 17° /11° | 6.2 mm | 5 | |
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Important Notice
Our weather forecast for East Sussex in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the East Sussex forecast closer to your planned date for the most up-to-date weather information.
East Sussex in September - FAQ
What are the expected maximum and minimum temperatures in East Sussex during September?
During September, expect a variety of temperatures with highs around 20° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in East Sussex during September?
Moderate rainfall is anticipated in East Sussex during September, with a total of 72.1 mm spread over approximately 11 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in East Sussex during September?
The average wind speed in East Sussex during September is 25 km/h, suggesting breezy to windy conditions, depending on your activities.
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