Click on a day for an hourly weather forecast
The temperatures in Swindon in September are usually low and can range between 10°C and 18°C.
You can expect about 3 to 8 days of rain in Swindon during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Swindon in September 2025.
If you’re planning to visit Swindon in the near future, we highly recommend that you review the 14 day weather forecast for Swindon before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 6° / 1° | 7 | 20 | 4 | 61 mm | Awful | Swindon in January |
| February | 7° / 2° | 8 | 16 | 5 | 66 mm | Awful | Swindon in February |
| March | 10° / 2° | 5 | 24 | 2 | 56 mm | Bad | Swindon in March |
| April | 13° / 4° | 5 | 24 | 1 | 55 mm | Ok | Swindon in April |
| May | 15° / 6° | 6 | 25 | 0 | 80 mm | Good | Swindon in May |
| June | 18° / 9° | 6 | 24 | 0 | 82 mm | Good | Swindon in June |
| July | 21° / 12° | 5 | 26 | 0 | 80 mm | Good | Swindon in July |
| August | 20° / 12° | 5 | 26 | 0 | 82 mm | Good | Swindon in August |
| September | 18° / 10° | 4 | 26 | 0 | 46 mm | Good | Swindon in September |
| October | 14° / 8° | 6 | 25 | 0 | 80 mm | Good | Swindon in October |
| November | 9° / 5° | 6 | 23 | 1 | 70 mm | Ok | Swindon in November |
| December | 7° / 3° | 7 | 21 | 3 | 74 mm | Awful | Swindon in December |