West Sussex (Crawley)
September
Weather in West Sussex for September 2026
Your guide to West Sussex weather in September - trends and predictions
Until now, September 2026 in West Sussex is slightly cooler than the historical average by 1.1 °C.
Expect cooler weather in the next days in West Sussex with the forecast suggesting a temperature of 20.4 °C, lower than the historical average.
In general, the average temperature in West Sussex at the beginning of September is 22.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.9 °C by the end of September.
West Sussex experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 81.9 mm.
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Temperatures
Rain 🌧️
More
9
Dry days
21
Rainy days
0
Snow days
19°/11°
Temperatures
22 km/h
Avg max wind
74 %
Avg humidity
West Sussex Weather September
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Temperatures trend during September in West Sussex
See the weather trend as well as the moving average line
September weather in West Sussex day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 23° /13° | 4.1 mm | 5 | |
| 2 Sept. | Patchy rain possible | 21° /13° | 1.6 mm | 4 | |
| 3 Sept. | Light rain shower | 23° /14° | 2.4 mm | 4 | |
| 4 Sept. | Light rain shower | 22° /12° | 3.6 mm | 4 | |
| 5 Sept. |  Sunny | 22° /12° | 5.1 mm | 5 | |
| 6 Sept. |  Overcast | 23° /14° | 1.9 mm | 5 | |
| 7 Sept. | Patchy rain possible | 24° /15° | 0.9 mm | 5 | |
| 8 Sept. |  Partly cloudy | 21° /13° | 6.5 mm | 5 | |
| 9 Sept. | Overcast | 21° /12° | 0 mm | 5 | |
| 10 Sept. | Light rain shower | 21° /12° | 2 mm | 4 | |
| 11 Sept. | Patchy rain possible | 22° /14° | 0.7 mm | 4.1 | |
| 12 Sept. | Partly cloudy | 22° /14° | 0 mm | 4.2 | |
| 13 Sept. | Patchy rain possible | 23° /16° | 4.5 mm | 2.9 | |
| 14 Sept. | Sunny | 24° /15° | 0 mm | 4.1 | |
| 15 Sept. | Sunny | 23° /15° | 0.1 mm | 6 | |
| 16 Sept. | Patchy rain possible | 19° /11° | 0.3 mm | 5 | |
| 17 Sept. | Overcast | 18° /10° | 0 mm | 4 | |
| 18 Sept. | Patchy rain possible | 18° /11° | 0.3 mm | 4 | |
| 19 Sept. | Overcast | 18° /13° | 20.6 mm | 5 | |
| 20 Sept. | Patchy rain possible | 18° /11° | 1.7 mm | 5 | |
| 21 Sept. | Light rain shower | 18° /13° | 5.9 mm | 5 | |
| 22 Sept. | Partly cloudy | 18° /12° | 0 mm | 5 | |
| 23 Sept. | Overcast | 22° /14° | 0.1 mm | 6 | |
| 24 Sept. | Overcast | 22° /15° | 0 mm | 5 | |
| 25 Sept. |  Mist | 18° /10° | 2.6 mm | 5 | |
| 26 Sept. |  Thundery outbreaks possible | 17° /10° | 6.5 mm | 4 | |
| 27 Sept. | Fog | 16° /9° | 2 mm | 4 | |
| 28 Sept. | Patchy rain possible | 17° /8° | 0.1 mm | 4 | |
| 29 Sept. | Patchy rain possible | 17° /9° | 1 mm | 4 | |
| 30 Sept. | Partly cloudy | 18° /9° | 5.4 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.
Change Month
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 19° and cooler nights around 11°. 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 81.9 mm spread over approximately 21 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 22 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 💧
Typically, West Sussex has 21 rainy days in September with a total of 81.9 mm of rainfall.
UV exposure in West Sussex during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in West Sussex
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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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