Finland · 1991–2020 normal
Mellilä in
December.
Typical December weather in Mellilä: -0.3°C by day, -5.2°C at night, 51 mm of rain over 11.7 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high-0.3°C
Typical low-5.2°C
Rain51 mm
Wet days11.7
Comfort score 5 this month (July leads the year at 77). Daylight is calculated as 5 h 40 from latitude 60.77°.
Event window
Long northern nights in December
At 60.8° the calculated mid-month daylight is 5 h 40. That darkness, not an aurora observation, is why this latitude is sought for northern or southern lights in December. Typical nights are -5.2°C.
Event window
Frost-level nights in December
The measured night-time normal is -5.2°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 646220
- NOAA station
- FI000002963 · JOKIOINEN JOKIOISTEN OBSERVATO
- Station distance
- 30.3 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.