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 25°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° / -4° | 8 | 21 | 3 | 83 mm | Awful | Somerset in January |
| February | 5° / -3° | 7 | 18 | 3 | 92 mm | Awful | Somerset in February |
| March | 10° / 1° | 7 | 22 | 2 | 116 mm | Awful | Somerset in March |
| April | 16° / 7° | 7 | 23 | 0 | 106 mm | Ok | Somerset in April |
| May | 21° / 12° | 9 | 22 | 0 | 105 mm | Ok | Somerset in May |
| June | 26° / 17° | 9 | 21 | 0 | 121 mm | Good | Somerset in June |
| July | 30° / 21° | 11 | 20 | 0 | 132 mm | Ok | Somerset in July |
| August | 29° / 20° | 9 | 22 | 0 | 128 mm | Ok | Somerset in August |
| September | 25° / 16° | 7 | 23 | 0 | 96 mm | Good | Somerset in September |
| October | 18° / 11° | 7 | 24 | 0 | 127 mm | Ok | Somerset in October |
| November | 11° / 4° | 6 | 24 | 0 | 82 mm | Ok | Somerset in November |
| December | 6° / 0° | 7 | 22 | 2 | 124 mm | Awful | Somerset in December |