Click on a day for an hourly weather forecast
The temperatures in Filton 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 Filton 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 Filton in September 2025.
If you’re planning to visit Filton in the near future, we highly recommend that you review the 14 day weather forecast for Filton before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 7° / 2° | 8 | 21 | 3 | 72 mm | Awful | Filton in January |
| February | 8° / 3° | 8 | 16 | 4 | 71 mm | Awful | Filton in February |
| March | 10° / 3° | 6 | 23 | 2 | 60 mm | Bad | Filton in March |
| April | 13° / 4° | 5 | 25 | 0 | 48 mm | Ok | Filton in April |
| May | 16° / 7° | 5 | 26 | 0 | 69 mm | Good | Filton in May |
| June | 19° / 10° | 6 | 24 | 0 | 74 mm | Good | Filton in June |
| July | 21° / 12° | 5 | 26 | 0 | 76 mm | Good | Filton in July |
| August | 20° / 12° | 6 | 25 | 0 | 84 mm | Good | Filton in August |
| September | 18° / 10° | 4 | 26 | 0 | 52 mm | Good | Filton in September |
| October | 14° / 8° | 6 | 25 | 0 | 89 mm | Good | Filton in October |
| November | 10° / 6° | 8 | 21 | 0 | 92 mm | Bad | Filton in November |
| December | 8° / 4° | 8 | 21 | 2 | 89 mm | Awful | Filton in December |