Click on a day for an hourly weather forecast
The temperatures in Alsace in September are comfortable with low of 11°C and and high up to 22°C.
You can expect about 3 to 8 days of rain in Alsace 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 Alsace in September 2025.
If you’re planning to visit Alsace in the near future, we highly recommend that you review the 14 day weather forecast for Alsace before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 5° / -1° | 8 | 14 | 9 | 88 mm | Awful | Alsace in January |
| February | 7° / 0° | 8 | 15 | 6 | 76 mm | Awful | Alsace in February |
| March | 12° / 3° | 6 | 22 | 3 | 63 mm | Bad | Alsace in March |
| April | 16° / 6° | 4 | 25 | 1 | 61 mm | Good | Alsace in April |
| May | 19° / 8° | 7 | 24 | 0 | 119 mm | Ok | Alsace in May |
| June | 23° / 12° | 7 | 23 | 0 | 120 mm | Good | Alsace in June |
| July | 25° / 14° | 7 | 24 | 0 | 134 mm | Good | Alsace in July |
| August | 26° / 14° | 5 | 26 | 0 | 95 mm | Perfect | Alsace in August |
| September | 22° / 11° | 4 | 26 | 0 | 58 mm | Good | Alsace in September |
| October | 16° / 7° | 5 | 26 | 0 | 68 mm | Good | Alsace in October |
| November | 10° / 4° | 6 | 22 | 2 | 78 mm | Bad | Alsace in November |
| December | 6° / 1° | 10 | 16 | 5 | 99 mm | Awful | Alsace in December |