Click on a day for an hourly weather forecast
The temperatures in Altrincham in September are usually low and can range between 10°C and 16°C.
You can expect about 3 to 8 days of rain in Altrincham 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 Altrincham in September 2025.
If you’re planning to visit Altrincham in the near future, we highly recommend that you review the 14 day weather forecast for Altrincham before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 5° / 1° | 10 | 13 | 8 | 106 mm | Awful | Altrincham in January |
| February | 6° / 1° | 10 | 10 | 9 | 104 mm | Awful | Altrincham in February |
| March | 9° / 2° | 8 | 19 | 4 | 89 mm | Awful | Altrincham in March |
| April | 12° / 4° | 6 | 22 | 2 | 65 mm | Bad | Altrincham in April |
| May | 14° / 6° | 8 | 23 | 0 | 90 mm | Ok | Altrincham in May |
| June | 17° / 9° | 8 | 22 | 0 | 108 mm | Ok | Altrincham in June |
| July | 19° / 11° | 8 | 23 | 0 | 123 mm | Ok | Altrincham in July |
| August | 18° / 12° | 8 | 23 | 0 | 122 mm | Ok | Altrincham in August |
| September | 16° / 10° | 7 | 23 | 0 | 92 mm | Ok | Altrincham in September |
| October | 13° / 7° | 9 | 22 | 0 | 125 mm | Bad | Altrincham in October |
| November | 8° / 4° | 11 | 18 | 2 | 123 mm | Awful | Altrincham in November |
| December | 6° / 2° | 10 | 16 | 5 | 110 mm | Awful | Altrincham in December |