Click on a day for an hourly weather forecast
The temperatures in Kalmar in September are usually low and can range between 12°C and 17°C.
You can expect about 3 to 8 days of rain in Kalmar 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 Kalmar in September 2025.
If you’re planning to visit Kalmar in the near future, we highly recommend that you review the 14 day weather forecast for Kalmar before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 2° / -1° | 5 | 12 | 14 | 53 mm | Awful | Kalmar in January |
| February | 2° / -1° | 5 | 11 | 13 | 45 mm | Awful | Kalmar in February |
| March | 5° / 1° | 5 | 19 | 7 | 32 mm | Awful | Kalmar in March |
| April | 9° / 4° | 3 | 25 | 2 | 25 mm | Bad | Kalmar in April |
| May | 13° / 8° | 4 | 27 | 0 | 41 mm | Ok | Kalmar in May |
| June | 18° / 12° | 5 | 25 | 0 | 61 mm | Good | Kalmar in June |
| July | 20° / 15° | 5 | 26 | 0 | 86 mm | Good | Kalmar in July |
| August | 20° / 15° | 4 | 27 | 0 | 62 mm | Good | Kalmar in August |
| September | 17° / 12° | 4 | 26 | 0 | 42 mm | Good | Kalmar in September |
| October | 11° / 8° | 5 | 26 | 0 | 60 mm | Ok | Kalmar in October |
| November | 7° / 5° | 8 | 20 | 3 | 73 mm | Awful | Kalmar in November |
| December | 4° / 1° | 7 | 15 | 9 | 56 mm | Awful | Kalmar in December |