Monthly weather forecast and climate
Helsinki, Finland

A scenic reflection in the water of the illuminated city of Helsinki in Finland, viewed from the water
A scenic reflection in the water of the illuminated city of Helsinki in Finland, viewed from the water

How much does it rain in Helsinki?

In Helsinki, Finland, during the entire year, the rain falls for 182 days and collects up to 655mm (25.8") of precipitation.

When does it snow in Helsinki?

January through March, November and December are months with snowfall in Helsinki, Finland.

How much does it snow in Helsinki?

Throughout the year, in Helsinki, 740mm (29.1") of snow is accumulated.

What is the coldest month in Helsinki?

The coldest month is February, with an average high-temperature of -1.9°C (28.6°F) and an average low-temperature of -7.4°C (18.7°F).

What is the snowiest month in Helsinki?

February is the month with the most snowfall, with 230mm (9.1") of accumulated snow.

What months are the sea coldest in Helsinki?

February and March, with an average sea temperature of 1°C (33.8°F), are months with the coldest seawater in Helsinki. For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.

What is the driest month in Helsinki?

The month with the least rainfall is April when the rain falls for 11 days and typically collects 32mm (1.3") of precipitation.

What is the warmest month in Helsinki?

The warmest month in Helsinki is July, with an average high-temperature of 21.5°C (70.7°F) and an average low-temperature of 14.2°C (57.6°F).

What is the rainiest month in Helsinki?

August is the month with the most rainfall. Rain falls for 15 days and accumulates 80mm (3.1") of precipitation.

When is the sea warmest in Helsinki?

August is the month with the warmest seawater in Helsinki, with an average sea temperature of 16°C (60.8°F). For swimming, a surface water temperature of 16°C (60.8°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).
Average temperature - Helsinki, Finland
Average rainfall - Helsinki, Finland
Average rainfall days - Helsinki, Finland

The month with the highest number of rainy days is December (20 days).
Months with the lowest number of rainy days are April and May (11 days).

Average snowfall - Helsinki, Finland

The month with the highest snowfall is February (230mm).
Months with the lowest snowfall are April, May, June, July, August, September and October (0mm).

Average sea temperature - Helsinki, Finland
Average daylight / Average sunshine - Helsinki, Finland
Average UV index - Helsinki, Finland
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