Finland · 1991–2020 normal
Mäntyharju in
December.
Typical December weather in Mäntyharju: -2.6°C by day, -7.7°C at night, 48 mm of rain over 11.1 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high-2.6°C
Typical low-7.7°C
Rain48 mm
Wet days11.1
Comfort score 5 this month (July leads the year at 73). Daylight is calculated as 5 h 26 from latitude 61.42°.
Event window
Long northern nights in December
At 61.4° the calculated mid-month daylight is 5 h 26. That darkness, not an aurora observation, is why this latitude is sought for northern or southern lights in December. Typical nights are -7.7°C.
Event window
Frost-level nights in December
The measured night-time normal is -7.7°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 646699
- NOAA station
- FIE00143927 · PERTUNMAA LAUKKALA
- Station distance
- 32 km from the place centre
- Coverage
- Good coverage · 15 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.