Finland · 1991–2020 normal
Rantsila in
December.
Typical December weather in Rantsila: -2.5°C by day, -8.4°C at night, 42 mm of rain over 10.1 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high-2.5°C
Typical low-8.4°C
Rain42 mm
Wet days10.1
Comfort score 5 this month (July leads the year at 71). Daylight is calculated as 3 h 59 from latitude 64.51°.
Event window
Long northern nights in December
At 64.5° the calculated mid-month daylight is 3 h 59. 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 639895
- NOAA station
- FIE00145627 · SIIKAJOKI REVONLAHTI
- Station distance
- 33.7 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.