Finland · 1991–2020 normal
Iisalmi in
December.
Typical December weather in Iisalmi: -3.8°C by day, -8.4°C at night, 61 mm of rain over 13.1 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high-3.8°C
Typical low-8.4°C
Rain61 mm
Wet days13.1
Comfort score 5 this month (July leads the year at 67). Daylight is calculated as 4 h 30 from latitude 63.56°.
Event window
Long northern nights in December
At 63.6° the calculated mid-month daylight is 4 h 30. That darkness, not an aurora observation, is why this latitude is sought for northern or southern lights in December. Typical nights are -8.4°C.
Event window
Frost-level nights in December
The measured night-time normal is -8.4°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 656820
- NOAA station
- FIE00145382 · VIEREMA KAARAKKALA
- Station distance
- 31.3 km from the place centre
- Coverage
- Strong coverage · 30 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.