Finland · 1991–2020 normal
Karstula in
December.
Typical December weather in Karstula: -2.5°C by day, -7.5°C at night, 49 mm of rain over 11.2 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high-2.5°C
Typical low-7.5°C
Rain49 mm
Wet days11.2
Comfort score 5 this month (July leads the year at 70). Daylight is calculated as 4 h 50 from latitude 62.87°.
Event window
Long northern nights in December
At 62.9° the calculated mid-month daylight is 4 h 50. That darkness, not an aurora observation, is why this latitude is sought for northern or southern lights in December. Typical nights are -7.5°C.
Event window
Frost-level nights in December
The measured night-time normal is -7.5°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 653852
- NOAA station
- FIE00144492 · ALAJARVI MOKSY-1
- Station distance
- 32.6 km from the place centre
- Coverage
- Good coverage · 17 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.