October weather forecast
Helsinki, Finland

October, the same as September, in Helsinki, Finland, is a frosty autumn month, with temperature in the range of an average high of 9°C (48.2°F) and an average low of 4.3°C (39.7°F).

Temperature

In October, the average high-temperature decreases from a moderate 14.6°C (58.3°F) in September to a frosty 9°C (48.2°F). In Helsinki, the average low-temperature is 4.3°C (39.7°F).

Rainfall

In October, in Helsinki, the rain falls for 16 days. Throughout October, 76mm (2.99") of precipitation is accumulated. Throughout the year, there are 182 rainfall days, and 655mm (25.79") of precipitation is accumulated.

Snowfall

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

Sea temperature

In Helsinki, the average water temperature is 10°C (50°F).
Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

Daylight

In Helsinki, the average length of the day in October is 10h and 7min.
On the first day of October, sunrise is at 07:25 and sunset at 18:54 EEST. On the last day of the month, sunrise is at 07:39 and sunset at 16:27 EET.
Note: On Sunday, 29. October 2023, at 04:00, Daylight Saving Time ends, and the time zone changes from EEST to EET. Daylight Saving Time starts again on Sunday, 31. March 2024, at 03:00; consequently, the time zone reverts from EET to EEST.

Sunshine

The average sunshine in October is 3h.

UV index

In October, the average daily maximum UV index is 1. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the average person.
Note: The average daily UV index of 1 in October transform into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.