Click on a day for an hourly weather forecast
The temperatures in Wiltshire 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 Wiltshire 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 Wiltshire in September 2025.
If you’re planning to visit Wiltshire in the near future, we highly recommend that you review the 14 day weather forecast for Wiltshire before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 6° / 1° | 7 | 20 | 4 | 61 mm | Awful | Wiltshire in January |
| February | 7° / 2° | 8 | 16 | 5 | 66 mm | Awful | Wiltshire in February |
| March | 10° / 2° | 5 | 24 | 2 | 56 mm | Bad | Wiltshire in March |
| April | 13° / 4° | 5 | 24 | 1 | 55 mm | Ok | Wiltshire in April |
| May | 15° / 6° | 6 | 25 | 0 | 80 mm | Good | Wiltshire in May |
| June | 18° / 9° | 6 | 24 | 0 | 82 mm | Good | Wiltshire in June |
| July | 21° / 12° | 5 | 26 | 0 | 80 mm | Good | Wiltshire in July |
| August | 20° / 12° | 5 | 26 | 0 | 82 mm | Good | Wiltshire in August |
| September | 18° / 10° | 4 | 26 | 0 | 46 mm | Good | Wiltshire in September |
| October | 14° / 8° | 6 | 25 | 0 | 80 mm | Good | Wiltshire in October |
| November | 9° / 5° | 6 | 23 | 1 | 70 mm | Ok | Wiltshire in November |
| December | 7° / 3° | 7 | 21 | 3 | 74 mm | Awful | Wiltshire in December |