Is Helsinki hot in December?
Days are typically cold at 1.4°C, while nights average -2.9°C.
Finland · 1991–2020 normal
Helsinki in
December.
Typical December weather in Helsinki: 1.4°C by day, -2.9°C at night, 58 mm of rain over 11.3 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high1.4°C
Typical low-2.9°C
Rain58 mm
Wet days11.3
In the year-round weather comparison, December scores 5 out of 100 (July leads the year at 85). Daylight is calculated as 5 h 52 from latitude 60.17°. Open-water sea temperature is 4.2°C (6 km from the place centre).
December at a glance
What is Helsinki like in December?
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Does it rain much?
The measured monthly average is 58 mm across about 11 wet days.
How much daylight is there?
There are about 5 h 52 between sunrise and sunset at mid-month, calculated from the place latitude.
Is December a good time to visit?
December ranks 12 of 12 in our weather comparison; July ranks first.
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 -2.9°C.
Event window
Frost-level nights in December
The measured night-time normal is -2.9°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 658225
- NOAA station
- FI000000304 · HELSINKI KAISANIEMI AWS
- Station distance
- 0.9 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.
Next step
Choose your month.
Then plan the details.
The weather comparison for Helsinki is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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