Click on a day for an hourly weather forecast
The temperatures in Slagelse in September are usually low and can range between 14°C and 17°C.
You can expect about 3 to 8 days of rain in Slagelse 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 Slagelse in September 2025.
If you’re planning to visit Slagelse in the near future, we highly recommend that you review the 14 day weather forecast for Slagelse before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / 1° | 7 | 15 | 10 | 49 mm | Awful | Slagelse in January |
| February | 3° / 1° | 6 | 13 | 9 | 42 mm | Awful | Slagelse in February |
| March | 5° / 2° | 5 | 21 | 4 | 39 mm | Awful | Slagelse in March |
| April | 9° / 5° | 4 | 25 | 2 | 31 mm | Bad | Slagelse in April |
| May | 13° / 9° | 5 | 26 | 0 | 62 mm | Ok | Slagelse in May |
| June | 17° / 13° | 4 | 26 | 0 | 72 mm | Good | Slagelse in June |
| July | 20° / 15° | 5 | 26 | 0 | 92 mm | Good | Slagelse in July |
| August | 20° / 16° | 6 | 25 | 0 | 92 mm | Good | Slagelse in August |
| September | 17° / 14° | 4 | 26 | 0 | 71 mm | Good | Slagelse in September |
| October | 12° / 10° | 6 | 25 | 0 | 67 mm | Ok | Slagelse in October |
| November | 8° / 7° | 7 | 22 | 1 | 59 mm | Bad | Slagelse in November |
| December | 5° / 3° | 7 | 17 | 7 | 57 mm | Awful | Slagelse in December |