January weather forecast
Helsinki, Finland

In the heart of winter, January in Helsinki, Finland, is embraced by frost. The lowest temperatures dip to -6.5°C (20.3°F), while the chilliest days see a high of -1.3°C (29.7°F). Snowfall is a frequent companion with 210mm (8.27") spread throughout the month, providing a classic winter scenery. Short daylight hours at 6.8h encapsulate the tranquil calmness of Finnish winter. All the while, rainfall is limited, offering locals and visitors a cool, dry month.

Temperature

The advent of January signifies a minor shift to an average high-temperature of a subzero cold -1.3°C (29.7°F), aligning closely with December. Throughout the January nights, Helsinki encounters a low-temperature of -6.5°C (20.3°F).

Rainfall

In Helsinki, in January, during 19 rainfall days, 52mm (2.05") of precipitation is typically accumulated. Throughout the year, there are 182 rainfall days, and 655mm (25.79") of precipitation is accumulated.

Snowfall

Months with snowfall are January through March, November and December. Throughout January, 210mm (8.27") of snow is accumulated. In Helsinki, during the entire year, snow aggregates up to 740mm (29.13").

Sea temperature

In Helsinki, Finland, in January, the average water temperature is 2°C (35.6°F).
Note: In swimming exercises, this state is seen as life-threatening and poses serious dangers. The painful sensation of the cold water induces immediate hyperventilation. A specialized swimsuit is required to limit thermal damage.

Daylight

In Helsinki, the average length of the day in January is 6h and 49min.
On the first day of the month, sunrise is at 09:23 and sunset at 15:23. On the last day of January, sunrise is at 08:38 and sunset at 16:29 EET.

Sunshine

In Helsinki, the average sunshine in January is 1.2h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 0. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 0 during January leads to these advisories:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.