Click on a day for an hourly weather forecast
The temperatures in Dornbirn in September are quite cold with temperatures between 6°C and 16°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Dornbirn. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Please note that Dornbirn can expect a few days of snow in September.
Our weather forecast can give you a great sense of what weather to expect in Dornbirn in September 2025.
If you’re planning to visit Dornbirn in the near future, we highly recommend that you review the 14 day weather forecast for Dornbirn before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 0° / -8° | 5 | 8 | 19 | 181 mm | Awful | Dornbirn in January |
| February | 1° / -8° | 5 | 6 | 18 | 114 mm | Awful | Dornbirn in February |
| March | 4° / -5° | 6 | 9 | 16 | 123 mm | Awful | Dornbirn in March |
| April | 9° / -1° | 9 | 11 | 10 | 102 mm | Awful | Dornbirn in April |
| May | 13° / 3° | 16 | 9 | 6 | 235 mm | Awful | Dornbirn in May |
| June | 18° / 7° | 16 | 14 | 0 | 285 mm | Ok | Dornbirn in June |
| July | 20° / 8° | 15 | 16 | 0 | 254 mm | Ok | Dornbirn in July |
| August | 20° / 9° | 14 | 17 | 0 | 283 mm | Ok | Dornbirn in August |
| September | 16° / 6° | 9 | 19 | 1 | 174 mm | Ok | Dornbirn in September |
| October | 11° / 2° | 6 | 18 | 7 | 158 mm | Bad | Dornbirn in October |
| November | 6° / -2° | 6 | 12 | 12 | 143 mm | Awful | Dornbirn in November |
| December | 1° / -6° | 6 | 8 | 19 | 170 mm | Awful | Dornbirn in December |