Swindon
September
Weather in Swindon for September 2025
Your guide to Swindon weather in September - trends and predictions
In general, the average temperature in Swindon at the beginning of September is 21.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 15.4 °C by the end of September.
The climate of Swindon in September is notably wet, with an average of 13 rainy days.
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17
Dry days
13
Rainy days
0
Snow days
20°/12°
Temperatures
21 km/h
Avg max wind
77 %
Avg humidity
Swindon in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  21° | 2  21° | 3 20° | 4  20° | 5 21° | 6  24° | 7 24° |
| 8 23° | 9 23° | 10 22° | 11 17° | 12  15° | 13 16° | 14 18° |
| 15 20° | 16  20° | 17 19° | 18 19° | 19 20° | 20 18° | 21 19° |
| 22 16° | 23  16° | 24 17° | 25 16° | 26 17° | 27 14° | 28 15° |
| 29 14° | 30 15° |
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Temperatures trend during September in Swindon
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. | Patchy rain possible | 21° /12° | 8.3 mm | 5 | |
| 2 Sept. | Overcast | 21° /13° | 0.2 mm | 5 | |
| 3 Sept. | Overcast | 20° /11° | 0.3 mm | 5 | |
| 4 Sept. | Sunny | 20° /12° | 0.2 mm | 6 | |
| 5 Sept. | Sunny | 21° /12° | 14.1 mm | 6 | |
| 6 Sept. | Partly cloudy | 24° /14° | 4.2 mm | 6 | |
| 7 Sept. | Sunny | 24° /14° | 0.2 mm | 6 | |
| 8 Sept. | Partly cloudy | 23° /15° | 15.6 mm | 6 | |
| 9 Sept. | Sunny | 23° /13° | 0.3 mm | 6 | |
| 10 Sept. | Partly cloudy | 22° /12° | 1.2 mm | 6 | |
| 11 Sept. | Light rain shower | 17° /10° | 0.9 mm | 4 | |
| 12 Sept. | Fog | 15° /7° | 0.8 mm | 4 | |
| 13 Sept. | Overcast | 16° /7° | 0 mm | 4 | |
| 14 Sept. | Overcast | 18° /9° | 0 mm | 5 | |
| 15 Sept. | Partly cloudy | 20° /9° | 0 mm | 5 | |
| 16 Sept. | Light drizzle | 20° /11° | 0.3 mm | 5 | |
| 17 Sept. | Light rain shower | 19° /11° | 2.7 mm | 4 | |
| 18 Sept. | Light drizzle | 19° /10° | 0.3 mm | 5 | |
| 19 Sept. | Light drizzle | 20° /11° | 0.6 mm | 5 | |
| 20 Sept. | Light rain shower | 18° /11° | 7.3 mm | 5 | |
| 21 Sept. | Light rain shower | 19° /10° | 2.7 mm | 5 | |
| 22 Sept. | Light rain shower | 16° /10° | 2.8 mm | 4 | |
| 23 Sept. | Cloudy | 16° /9° | 0.1 mm | 4 | |
| 24 Sept. | Patchy rain possible | 17° /11° | 0.5 mm | 4 | |
| 25 Sept. | Patchy rain possible | 16° /10° | 2.1 mm | 4 | |
| 26 Sept. | Patchy light drizzle | 17° /10° | 3.6 mm | 4 | |
| 27 Sept. | Fog | 14° /8° | 4.7 mm | 4 | |
| 28 Sept. | Overcast | 15° /7° | 1 mm | 4 | |
| 29 Sept. | Partly cloudy | 14° /8° | 5.5 mm | 4 | |
| 30 Sept. | Overcast | 15° /9° | 5.5 mm | 4 | |
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Important Notice
Our weather forecast for Swindon 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 Swindon forecast closer to your planned date for the most up-to-date weather information.
Swindon in September - FAQ
What are the expected maximum and minimum temperatures in Swindon 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 Swindon during September?
In September, Swindon can expect light to moderate rainfall, totaling 37.3 mm across approximately 13 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Swindon during September?
The average wind speed in Swindon during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
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