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 in September brings notable rainfall, with an average of 18 rainy days and a total precipitation of 101.7 mm.
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Temperatures
Rain 🌧️
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12
Dry days
18
Rainy days
0
Snow days
20°/12°
Temperatures
21 km/h
Avg max wind
75 %
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 20° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in West Sussex during September?
Significant rainfall exceeding 101.7 mm is expected in West Sussex during September, occurring over more than 18 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in West Sussex during September?
The average wind speed in West Sussex during September is 21 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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