Finland · 1991–2020 normal
Jollas in
December.
Typical December weather in Jollas: 1.6°C by day, -2.3°C at night, 45 mm of rain over 9.9 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high1.6°C
Typical low-2.3°C
Rain45 mm
Wet days9.9
Comfort score 5 this month (July leads the year at 81). Daylight is calculated as 5 h 52 from latitude 60.16°. Open-water sea temperature is 4.2°C (5 km from the place centre).
Event window
Long northern nights in December
At 60.2° 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 -2.3°C.
Event window
Frost-level nights in December
The measured night-time normal is -2.3°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 655661
- NOAA station
- FIE00142311 · HELSINKI ISOSAARI
- Station distance
- 6.5 km from the place centre
- Coverage
- Good coverage · 17 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.