What December feels like in Helsinki
Early winter arrives in Helsinki with December. Afternoons stay around freezing — the sort of cold that makes long outdoor stretches hard work. There is little difference between day and night: nights hover around freezing, so frost is common, and evenings feel much like the afternoon. The air is damp, which makes cool temperatures feel colder, particularly in wind.
Rain in Helsinki in December
December is persistently wet here: some rain falls on about every other day. A rainy day brings about 4.7 mm (0.2 in) on average — steady rain rather than a passing shower. That is close to Helsinki's typical rain per wet day for the whole year (about 5.2 mm).
Daylight and sunshine in December
Mid-month, Helsinki gets 5 h 54 min of daylight, from sunrise near 9:18 am to sunset near 3:12 pm. Compared with mid-November, the day has lost 1 h 41 min. Measured sunshine covers about 22% of the daylight — skies are often cloudy.
How December compares to the rest of the year
In Helsinki's temperature order, December sits as the 3rd coolest month. Against November, the average high is 3.2°C (5.8°F) lower, with 3 mm less rain. January is cooler again. By January, typical highs are -1.7°C (28.9°F).
Who December suits
- Sightseeing: less ideal — it is cold for long walks.
- Parks & outdoor: less ideal — too cool to sit outside for long.
- Beach: less ideal — the sea air is too cool.
- Museums & indoor: a good choice — warm places to spend the coldest part of the day.
Tips for visiting Helsinki in December
Rain Protection
A packable rain jacket saves the day on showery afternoons.
Warm Layers
A proper winter coat, with gloves and a hat for early starts.
Quick questions
How warm is Helsinki in December?
It feels freezing: typical highs are 1.1°C (34°F), with lows near -2.4°C (27.7°F).
Does it rain a lot in Helsinki in December?
Quite a lot — 65 mm spread over about 14 days.
What should I wear in Helsinki in December?
Based on the averages: rain protection and warm layers. Evenings feel similar to the day, so the same clothes work from morning to night.
Is December or January better for visiting Helsinki?
January, narrowly: it ranks #11 of 12 among Helsinki's months, against #12 for the other. January is cooler and has fewer rainy days.