Finland · 1991–2020 normal
Siuntio in
December.
Typical December weather in Siuntio: 0.7°C by day, -3.6°C at night, 67 mm of rain over 12.3 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high0.7°C
Typical low-3.6°C
Rain67 mm
Wet days12.3
Comfort score 5 this month (July leads the year at 82). Daylight is calculated as 5 h 52 from latitude 60.14°. Open-water sea temperature is 4.3°C (22 km from the place centre).
Event window
Long northern nights in December
At 60.1° the calculated mid-month daylight is 5 h 52. That darkness, not an aurora observation, is why this latitude is sought for northern or southern lights in December. Typical nights are -3.6°C.
Event window
Frost-level nights in December
The measured night-time normal is -3.6°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 636608
- NOAA station
- FIE00142106 · LOHJA PORLA
- Station distance
- 15.2 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.