Click on a day for an hourly weather forecast
The temperatures in Derby in September are usually low and can range between 11°C and 17°C.
You can expect about 3 to 8 days of rain in Derby 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 Derby in September 2025.
If you’re planning to visit Derby in the near future, we highly recommend that you review the 14 day weather forecast for Derby before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 7° / 3° | 10 | 17 | 3 | 133 mm | Awful | Derby in January |
| February | 8° / 3° | 10 | 15 | 4 | 113 mm | Awful | Derby in February |
| March | 10° / 4° | 8 | 22 | 1 | 92 mm | Bad | Derby in March |
| April | 12° / 5° | 6 | 24 | 1 | 71 mm | Ok | Derby in April |
| May | 15° / 7° | 6 | 25 | 0 | 77 mm | Good | Derby in May |
| June | 17° / 10° | 7 | 23 | 0 | 98 mm | Ok | Derby in June |
| July | 19° / 12° | 6 | 25 | 0 | 96 mm | Good | Derby in July |
| August | 18° / 12° | 7 | 24 | 0 | 103 mm | Ok | Derby in August |
| September | 17° / 11° | 5 | 25 | 0 | 77 mm | Good | Derby in September |
| October | 14° / 9° | 8 | 23 | 0 | 122 mm | Ok | Derby in October |
| November | 10° / 6° | 9 | 20 | 0 | 141 mm | Bad | Derby in November |
| December | 8° / 5° | 9 | 20 | 2 | 145 mm | Awful | Derby in December |