Finland · 1991–2020 normal
Röykkä in
December.
Typical December weather in Röykkä: -0.2°C by day, -4.6°C at night, 60 mm of rain over 12.8 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high-0.2°C
Typical low-4.6°C
Rain60 mm
Wet days12.8
Comfort score 5 this month (July leads the year at 81). Daylight is calculated as 5 h 45 from latitude 60.49°. Open-water sea temperature is 4.3°C (40 km from the place centre).
Event window
Long northern nights in December
At 60.5° the calculated mid-month daylight is 5 h 45. That darkness, not an aurora observation, is why this latitude is sought for northern or southern lights in December. Typical nights are -4.6°C.
Event window
Frost-level nights in December
The measured night-time normal is -4.6°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 638915
- NOAA station
- FIE00142846 · NURMIJARVI GEOFYSIIKAN OBSERVA
- Station distance
- 2.3 km from the place centre
- Coverage
- Good coverage · 22 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.