Click on a day for an hourly weather forecast
The temperatures in Exeter in September are usually low and can range between 13°C and 17°C.
You can expect about 3 to 8 days of rain in Exeter 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 Exeter in September 2025.
If you’re planning to visit Exeter in the near future, we highly recommend that you review the 14 day weather forecast for Exeter before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 9° / 6° | 10 | 19 | 1 | 125 mm | Bad | Exeter in January |
| February | 9° / 5° | 9 | 18 | 1 | 114 mm | Bad | Exeter in February |
| March | 10° / 6° | 8 | 22 | 1 | 86 mm | Bad | Exeter in March |
| April | 12° / 7° | 5 | 24 | 0 | 73 mm | Ok | Exeter in April |
| May | 14° / 9° | 6 | 25 | 0 | 82 mm | Good | Exeter in May |
| June | 17° / 12° | 6 | 24 | 0 | 96 mm | Good | Exeter in June |
| July | 19° / 14° | 6 | 25 | 0 | 98 mm | Good | Exeter in July |
| August | 19° / 14° | 7 | 24 | 0 | 106 mm | Ok | Exeter in August |
| September | 17° / 13° | 4 | 26 | 0 | 68 mm | Good | Exeter in September |
| October | 15° / 11° | 8 | 23 | 0 | 141 mm | Ok | Exeter in October |
| November | 12° / 9° | 9 | 21 | 0 | 137 mm | Bad | Exeter in November |
| December | 10° / 7° | 9 | 21 | 1 | 131 mm | Bad | Exeter in December |