Click on a day for an hourly weather forecast
The weather in Iisalmi in December is very cold with temperatures between -6°C and -3°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Iisalmi during the month of December. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Let it snow! You can expect Iisalmi to be covered in white during the month of December. Be sure to bundle up when you venture outside, or take the opportunity to enjoy hot cocoa by the fire for warmth this month.
Our weather forecast can give you a great sense of what weather to expect in Iisalmi in December 2026.
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 |