Click on a day for an hourly weather forecast
The temperatures in Sundern in September are usually low and can range between 10°C and 19°C.
You can expect about 3 to 8 days of rain in Sundern 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 Sundern in September 2026.
If you’re planning to visit Sundern in the near future, we highly recommend that you review the 14 day weather forecast for Sundern before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 4° / -1° | 13 | 15 | 3 | 86 mm | Awful | Sundern in January |
| February | 5° / -1° | 9 | 17 | 2 | 70 mm | Awful | Sundern in February |
| March | 9° / 1° | 8 | 21 | 2 | 68 mm | Awful | Sundern in March |
| April | 14° / 4° | 8 | 22 | 0 | 50 mm | Good | Sundern in April |
| May | 17° / 7° | 9 | 22 | 0 | 72 mm | Ok | Sundern in May |
| June | 21° / 11° | 9 | 21 | 0 | 84 mm | Ok | Sundern in June |
| July | 23° / 13° | 9 | 22 | 0 | 95 mm | Good | Sundern in July |
| August | 23° / 13° | 10 | 21 | 0 | 88 mm | Good | Sundern in August |
| September | 19° / 10° | 7 | 23 | 0 | 63 mm | Ok | Sundern in September |
| October | 14° / 7° | 8 | 23 | 0 | 71 mm | Ok | Sundern in October |
| November | 9° / 4° | 8 | 22 | 0 | 68 mm | Bad | Sundern in November |
| December | 5° / 1° | 12 | 16 | 3 | 85 mm | Awful | Sundern in December |