Helsinki Weather in January

In January, Helsinki averages a high of -1°C (30°F) and a low of -6°C (21°F), from 56 years of daily records (1971–2026).

-1°C

Average high

30°F

-6°C

Average low

21°F

8°C

Record high

47°F · January 6, 1973

-34°C

Record low

-30°F · January 10, 1987

What January Is Like in Helsinki

January in Helsinki has become 1.9°C (3.5°F) warmer on average: the 2012–2026 average against 1970–1989.
The January heat record, 8°C (47°F) on January 6, 1973, has stood for 53 years.
The coldest January reading, -34°C (-30°F) on January 10, 1987, has not been matched in 39 years.
January is the least predictable month in Helsinki: daytime highs vary more from day to day and year to year than in any other month.

At least 1 mm of rain falls on 36% of January days, and the month averages 51 mm in total.

Average daytime high in Helsinki, every January since 1971

Warmest: 2020 (4.8°C)Latest: 2026 (-5.2°C)10-year averageLong-run average (-1.3°C)

See the weather in Helsinki on any January date, year by year.

Source: NOAA GHCN-Daily, Helsinki Kaisaniemi Aws (1971–2026); Helsinki Rautatientori (2009–2015). Averages cover 1971–2026. How we compute this