Click on a day for an hourly weather forecast
The temperatures in Vienna in September are comfortable with low of 12°C and and high up to 21°C.
You can expect about 3 to 8 days of rain in Vienna 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 Vienna in September 2025.
If you’re planning to visit Vienna in the near future, we highly recommend that you review the 14 day weather forecast for Vienna before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / -2° | 8 | 11 | 13 | 65 mm | Awful | Vienna in January |
| February | 5° / -1° | 7 | 13 | 9 | 65 mm | Awful | Vienna in February |
| March | 10° / 3° | 6 | 20 | 5 | 56 mm | Bad | Vienna in March |
| April | 15° / 6° | 5 | 24 | 1 | 56 mm | Good | Vienna in April |
| May | 19° / 10° | 9 | 23 | 0 | 123 mm | Ok | Vienna in May |
| June | 23° / 14° | 7 | 23 | 0 | 126 mm | Good | Vienna in June |
| July | 26° / 16° | 7 | 24 | 0 | 109 mm | Good | Vienna in July |
| August | 26° / 16° | 4 | 27 | 0 | 78 mm | Perfect | Vienna in August |
| September | 21° / 12° | 5 | 25 | 0 | 89 mm | Good | Vienna in September |
| October | 15° / 8° | 5 | 26 | 0 | 74 mm | Good | Vienna in October |
| November | 9° / 4° | 5 | 23 | 2 | 55 mm | Bad | Vienna in November |
| December | 4° / 0° | 8 | 16 | 7 | 55 mm | Awful | Vienna in December |