Helsinki Weather in December
In December, Helsinki averages a high of 1°C (33°F) and a low of -4°C (25°F), based on 55 years of historical weather data from HELSINKI RAUTATIENTORI.
1°C
Average high
33°F
-4°C
Average low
25°F
11°C
Record high
51°F · 2015
-29°C
Record low
-21°F · 1978
What to Expect in Helsinki in December
Typical December days in Helsinki reach 1°C (33°F) during the afternoon and cool to around -4°C (25°F) overnight. On average, measurable rain falls on about 66% of days this month. Over the past 55 years, December temperatures in Helsinki have ranged from a record high of 11°C (2015) down to a record low of -29°C (1978).
For a day-by-day look or other months, see the full Helsinki weather history.