Click on a day for an hourly weather forecast
The temperatures in Iisalmi in September are quite cold with temperatures between 8°C and 13°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Iisalmi 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 Iisalmi in September 2027.
If you’re planning to visit Iisalmi in the near future, we highly recommend that you review the 14 day weather forecast for Iisalmi before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -6° / -10° | 3 | 3 | 26 | 70 mm | Awful | Iisalmi in January |
| February | -5° / -10° | 2 | 3 | 23 | 66 mm | Awful | Iisalmi in February |
| March | -2° / -7° | 5 | 5 | 22 | 58 mm | Awful | Iisalmi in March |
| April | 4° / -1° | 6 | 12 | 13 | 51 mm | Awful | Iisalmi in April |
| May | 12° / 5° | 6 | 23 | 2 | 64 mm | Bad | Iisalmi in May |
| June | 18° / 10° | 6 | 24 | 0 | 74 mm | Good | Iisalmi in June |
| July | 21° / 13° | 6 | 26 | 0 | 95 mm | Good | Iisalmi in July |
| August | 19° / 12° | 5 | 26 | 0 | 86 mm | Good | Iisalmi in August |
| September | 13° / 8° | 5 | 25 | 0 | 69 mm | Ok | Iisalmi in September |
| October | 6° / 3° | 6 | 18 | 6 | 63 mm | Awful | Iisalmi in October |
| November | 2° / -1° | 6 | 10 | 14 | 67 mm | Awful | Iisalmi in November |
| December | -3° / -6° | 5 | 3 | 24 | 80 mm | Awful | Iisalmi in December |