East Sussex (Eastbourne)
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.
East Sussex in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 100.1 mm.
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Temperatures
Rain 🌧️
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13
Dry days
17
Rainy days
0
Snow days
19°/14°
Temperatures
27 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?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in East Sussex during September?
Significant rainfall exceeding 100.1 mm is expected in East Sussex during September, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in East Sussex during September?
The average wind speed in East Sussex during September is 27 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in East Sussex
Explore the daily rainfall trends and prepare for East Sussexs September weather 💧
UV exposure in East Sussex during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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