Click on a day for an hourly weather forecast
The temperatures in Somerset in September are comfortable with low of 16°C and and high up to 26°C.
You can expect about 3 to 8 days of rain in Somerset 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 Somerset in September 2025.
If you’re planning to visit Somerset in the near future, we highly recommend that you review the 14 day weather forecast for Somerset before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / -5° | 4 | 21 | 7 | 46 mm | Awful | Somerset in January |
| February | 4° / -4° | 3 | 17 | 8 | 58 mm | Awful | Somerset in February |
| March | 12° / 3° | 6 | 21 | 3 | 129 mm | Bad | Somerset in March |
| April | 17° / 8° | 7 | 22 | 1 | 127 mm | Ok | Somerset in April |
| May | 23° / 13° | 9 | 22 | 0 | 190 mm | Good | Somerset in May |
| June | 29° / 19° | 9 | 21 | 0 | 148 mm | Ok | Somerset in June |
| July | 30° / 20° | 9 | 22 | 0 | 184 mm | Ok | Somerset in July |
| August | 30° / 19° | 8 | 23 | 0 | 167 mm | Ok | Somerset in August |
| September | 26° / 16° | 6 | 24 | 0 | 119 mm | Perfect | Somerset in September |
| October | 19° / 9° | 5 | 25 | 1 | 109 mm | Good | Somerset in October |
| November | 12° / 3° | 4 | 25 | 1 | 68 mm | Ok | Somerset in November |
| December | 6° / -2° | 3 | 23 | 5 | 61 mm | Awful | Somerset in December |