October weather forecast
Helsinki, Finland

October in Helsinki features an escalating autumn chill, culminating in a bracing climatic experience. With sea temperatures retreating to 10°C (50°F) and with daylight hours decreasing to 10.1h, the city prepares for the winter ahead. The first impressions of winter's chill can be sensed by the month-end, signifying the closing phase of autumn. Rainfall occurrence remains moderate, contributing to the damp, crisp atmosphere typical of the autumn season.

Temperature

The onset of October comes with a shift in the average high-temperature, falling from a mild 14.6°C (58.3°F) in September to a chilly 9°C (48.2°F). Throughout the nights in October, Helsinki notes an average low of 4.3°C (39.7°F), a small dip from the daytime peak.

Rainfall

In Helsinki, in October, during 16 rainfall days, 76mm (2.99") of precipitation is typically accumulated. In Helsinki, during the entire year, the rain falls for 182 days and collects up to 655mm (25.79") of precipitation.

Snowfall

In Helsinki, snow does not fall in April through October.

Sea temperature

In Helsinki, in October, the average water temperature is 10°C (50°F).
Note: While a brief time in 10°C (50°F) at 13°C (55.4°F) is already bracing, plunging below 10°C (50°F) can severely affect breathing and introduce a cold shock, relying on your physical state.

Daylight

In Helsinki, the average length of the day in October is 10h and 7min.
On the first day of October in Helsinki, sunrise is at 07:27 and sunset at 18:52 EEST. On the last day of the month, sunrise is at 07:41 and sunset at 16:25 EET.
Note: On Sunday, 27. October 2024, at 04:00, Daylight Saving Time ends, and the time zone changes from EEST to EET. Daylight Saving Time starts again on Sunday, 30. March 2025, at 03:00; consequently, the time zone reverts from EET to EEST.

Sunshine

The average sunshine in October in Helsinki, Finland, is 3h.

UV index

In Helsinki, Finland, the average daily maximum UV index in October is 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 1 during October translates into the following guidance:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.