Click on a day for an hourly weather forecast
The temperatures in Chester in September are quite cold with temperatures between 9°C and 17°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Chester 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 Chester in September 2025.
If you’re planning to visit Chester in the near future, we highly recommend that you review the 14 day weather forecast for Chester before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 6° / 2° | 9 | 17 | 5 | 80 mm | Awful | Chester in January |
| February | 7° / 2° | 7 | 16 | 5 | 74 mm | Awful | Chester in February |
| March | 10° / 2° | 7 | 22 | 3 | 71 mm | Awful | Chester in March |
| April | 12° / 4° | 6 | 23 | 1 | 66 mm | Ok | Chester in April |
| May | 15° / 6° | 8 | 23 | 0 | 91 mm | Ok | Chester in May |
| June | 18° / 9° | 8 | 22 | 0 | 121 mm | Ok | Chester in June |
| July | 20° / 11° | 9 | 22 | 0 | 111 mm | Ok | Chester in July |
| August | 19° / 11° | 6 | 25 | 0 | 95 mm | Good | Chester in August |
| September | 17° / 9° | 6 | 24 | 0 | 75 mm | Good | Chester in September |
| October | 14° / 8° | 6 | 25 | 0 | 85 mm | Good | Chester in October |
| November | 10° / 5° | 9 | 20 | 1 | 97 mm | Bad | Chester in November |
| December | 7° / 3° | 8 | 20 | 2 | 86 mm | Awful | Chester in December |