Click on a day for an hourly weather forecast
The temperatures in Gloucester 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 Gloucester 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 Gloucester in September 2025.
If you’re planning to visit Gloucester in the near future, we highly recommend that you review the 14 day weather forecast for Gloucester before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 6° / 2° | 7 | 19 | 5 | 52 mm | Awful | Gloucester in January |
| February | 7° / 2° | 7 | 16 | 6 | 49 mm | Bad | Gloucester in February |
| March | 10° / 3° | 5 | 23 | 3 | 45 mm | Bad | Gloucester in March |
| April | 12° / 4° | 4 | 26 | 1 | 38 mm | Ok | Gloucester in April |
| May | 15° / 7° | 5 | 26 | 0 | 58 mm | Good | Gloucester in May |
| June | 18° / 10° | 4 | 26 | 0 | 60 mm | Good | Gloucester in June |
| July | 20° / 12° | 3 | 28 | 0 | 59 mm | Good | Gloucester in July |
| August | 20° / 12° | 5 | 26 | 0 | 68 mm | Good | Gloucester in August |
| September | 18° / 10° | 3 | 27 | 0 | 38 mm | Good | Gloucester in September |
| October | 14° / 8° | 5 | 26 | 0 | 67 mm | Good | Gloucester in October |
| November | 9° / 5° | 6 | 23 | 1 | 61 mm | Ok | Gloucester in November |
| December | 7° / 3° | 6 | 22 | 3 | 59 mm | Bad | Gloucester in December |