Click on a day for an hourly weather forecast
The temperatures in Konstanz in September are quite cold with temperatures between 8°C and 19°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Konstanz 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 Konstanz in September 2026.
If you’re planning to visit Konstanz in the near future, we highly recommend that you review the 14 day weather forecast for Konstanz before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / -4° | 7 | 8 | 16 | 109 mm | Awful | Konstanz in January |
| February | 4° / -4° | 6 | 8 | 16 | 83 mm | Awful | Konstanz in February |
| March | 8° / -1° | 7 | 14 | 10 | 86 mm | Awful | Konstanz in March |
| April | 14° / 2° | 7 | 19 | 4 | 84 mm | Bad | Konstanz in April |
| May | 17° / 6° | 12 | 19 | 1 | 182 mm | Ok | Konstanz in May |
| June | 21° / 10° | 11 | 19 | 0 | 195 mm | Ok | Konstanz in June |
| July | 23° / 11° | 11 | 20 | 0 | 187 mm | Good | Konstanz in July |
| August | 23° / 11° | 10 | 21 | 0 | 171 mm | Good | Konstanz in August |
| September | 19° / 8° | 6 | 24 | 0 | 103 mm | Good | Konstanz in September |
| October | 14° / 4° | 6 | 23 | 2 | 90 mm | Ok | Konstanz in October |
| November | 9° / 1° | 6 | 17 | 8 | 83 mm | Bad | Konstanz in November |
| December | 4° / -3° | 7 | 10 | 14 | 108 mm | Awful | Konstanz in December |