West Sussex (Crawley)
September
Weather in West Sussex for September 2025
Your guide to West Sussex weather in September - trends and predictions
In general, the average temperature in West Sussex at the beginning of September is 23.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.9 °C by the end of September.
West Sussex sees moderate rainfall in September, averaging 9 rainy days.
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21
Dry days
9
Rainy days
0
Snow days
22°/14°
Temperatures
20 km/h
Avg max wind
73 %
Avg humidity
West Sussex in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  25° | 2 22° | 3  24° | 4  23° | 5 22° | 6  24° | 7 26° |
| 8 23° | 9 24° | 10 23° | 11 19° | 12  18° | 13 17° | 14 20° |
| 15 21° | 16 23° | 17  21° | 18 21° | 19 20° | 20  20° | 21 20° |
| 22 18° | 23  17° | 24 17° | 25 18° | 26  18° | 27 16° | 28 16° |
| 29 16° | 30 17° |
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Temperatures trend during September in West 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 | 25° /15° | 7 mm | 6 | |
| 2 Sept. | Patchy rain possible | 22° /15° | 0.3 mm | 5 | |
| 3 Sept. | Mist | 24° /13° | 1.2 mm | 5 | |
| 4 Sept. | Sunny | 23° /13° | 4.4 mm | 6 | |
| 5 Sept. | Sunny | 22° /13° | 10.1 mm | 6 | |
| 6 Sept. | Partly cloudy | 24° /15° | 3.7 mm | 6 | |
| 7 Sept. | Sunny | 26° /15° | 1.3 mm | 6 | |
| 8 Sept. | Partly cloudy | 23° /15° | 6 mm | 6 | |
| 9 Sept. | Sunny | 24° /14° | 0 mm | 6 | |
| 10 Sept. | Partly cloudy | 23° /14° | 2.2 mm | 6 | |
| 11 Sept. | Partly cloudy | 19° /11° | 0.1 mm | 5 | |
| 12 Sept. | Overcast | 18° /9° | 0.6 mm | 4 | |
| 13 Sept. | Overcast | 17° /9° | 0 mm | 5 | |
| 14 Sept. | Partly cloudy | 20° /9° | 0 mm | 6 | |
| 15 Sept. | Sunny | 21° /10° | 0 mm | 6 | |
| 16 Sept. | Partly cloudy | 23° /12° | 0 mm | 7 | |
| 17 Sept. | Light drizzle | 21° /12° | 0.6 mm | 5 | |
| 18 Sept. | Light rain shower | 21° /12° | 8.2 mm | 5 | |
| 19 Sept. | Light rain shower | 20° /13° | 0.8 mm | 5 | |
| 20 Sept. | Moderate rain | 20° /13° | 18.4 mm | 5 | |
| 21 Sept. | Light rain shower | 20° /12° | 6 mm | 5 | |
| 22 Sept. | Light rain shower | 18° /11° | 2.6 mm | 4 | |
| 23 Sept. | Cloudy | 17° /9° | 0.1 mm | 4 | |
| 24 Sept. | Overcast | 17° /11° | 1.6 mm | 4 | |
| 25 Sept. | Mist | 18° /12° | 3.8 mm | 5 | |
| 26 Sept. | Thundery outbreaks possible | 18° /11° | 9.8 mm | 5 | |
| 27 Sept. | Fog | 16° /10° | 3.1 mm | 4 | |
| 28 Sept. | Patchy rain possible | 16° /8° | 0.1 mm | 4 | |
| 29 Sept. | Light rain shower | 16° /9° | 1.5 mm | 4 | |
| 30 Sept. | Partly cloudy | 17° /9° | 8.1 mm | 5 | |
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Important Notice
Our weather forecast for West 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 West Sussex forecast closer to your planned date for the most up-to-date weather information.
West Sussex in September - FAQ
What are the expected maximum and minimum temperatures in West Sussex during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in West Sussex during September?
Moderate rainfall is anticipated in West Sussex during September, with a total of 70.4 mm spread over approximately 9 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in West Sussex during September?
The average wind speed in West Sussex during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in West Sussex
Explore the daily rainfall trends and prepare for West Sussexs September weather 💧
UV exposure in West Sussex during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is West Sussex?Get accurate weather forecasts for West Sussex, located at latitude 51.113 and longitude -0.183. Stay updated with localized weather information tailored for West Sussex.
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