Helsinki
Finland
Long-term weather forecast
Long-term weather forecast

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
January, the same as December, in Helsinki, Finland, is another subzero cold winter month, with average temperature varying between -6.5°C (20.3°F) and -1.3°C (29.7°F). In January, the average high-temperature is almost the same as in December - a freezing cold -1.3°C (29.7°F). Weather in January »

The last month of the winter, February, is another freezing cold month in Helsinki, Finland, with average temperature ranging between min -7.4°C (18.7°F) and max -1.9°C (28.6°F). 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). Weather in February »

The first month of the spring, March, is a wintry month in Helsinki, Finland, with average temperature fluctuating between -4.1°C (24.6°F) and 1.6°C (34.9°F). In March, the average high-temperature slightly increases, from a freezing cold -1.9°C (28.6°F) in February, to a cold 1.6°C (34.9°F). Weather in March »

April is a chilly spring month in Helsinki, Finland, with average temperature ranging between min 0.8°C (33.4°F) and max 7.6°C (45.7°F). In Helsinki, the average high-temperature rises, from a cold 1.6°C (34.9°F) in March, to a frosty 7.6°C (45.7°F). Weather in April »

May, the last month of the spring, in Helsinki, is a mild month, with average temperature varying between 14.4°C (57.9°F) and 6.3°C (43.3°F). In May, the average high-temperature increases, from a frosty 7.6°C (45.7°F) in April, to a mild 14.4°C (57.9°F). Weather in May »

The first month of the summer, June, is an enjoyable month in Helsinki, Finland, with temperature in the range of an average high of 18.5°C (65.3°F) and an average low of 10.9°C (51.6°F). In Helsinki, the average high-temperature marginally rises, from a moderate 14.4°C (57.9°F) in May, to a comfortable 18.5°C (65.3°F). Weather in June »

July in Helsinki, Finland, is an agreeable summer month, with average temperature varying between 21.5°C (70.7°F) and 14.2°C (57.6°F). The warmest month 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). Weather in July »

August, the last month of the summer, in Helsinki, is also an enjoyable month, with average temperature ranging between max 19.8°C (67.6°F) and min 13.1°C (55.6°F). In Helsinki, the average high-temperature is essentially the same as in July - a comfortable 19.8°C (67.6°F). Weather in August »

The first month of the autumn, September, is still a mild month in Helsinki, Finland, with temperature in the range of an average low of 8.7°C (47.7°F) and an average high of 14.6°C (58.3°F). In September, the average high-temperature decreases, from a comfortable 19.8°C (67.6°F) in August, to a moderate 14.6°C (58.3°F). Weather in September »

October, the same as September, in Helsinki, Finland, is another chilly autumn month, with average temperature varying between 9°C (48.2°F) and 4.3°C (39.7°F). In Helsinki, the average high-temperature in October decreases, from a moderate 14.6°C (58.3°F) in September, to a chilly 9°C (48.2°F). Weather in October »

November, the last month of the autumn, in Helsinki, is also a wintry month, with temperature in the range of an average low of -0.6°C (30.9°F) and an average high of 3.7°C (38.7°F). In November, the average high-temperature decreases, from a chilly 9°C (48.2°F) in October, to a cold 3.7°C (38.7°F). Weather in November »

December, the first month of the winter, in Helsinki, is still a cold month, with temperature in the range of an average low of -4.5°C (23.9°F) and an average high of 0.5°C (32.9°F). In December, the average high-temperature slightly decreases, from a cold 3.7°C (38.7°F) in November, to a still wintry 0.5°C (32.9°F). Weather in December »

How many days does it rain in Helsinki?

In Helsinki, Finland, during the entire year, the rain falls for 182 days and collects up to 655mm (25.79") 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?

In Helsinki, during the entire year, snow aggregates up to 740mm (29.13").

When is the lowest UV index in Helsinki?

Months with the lowest UV index in Helsinki are January, February, November and December, with an average maximum UV index of 0.

What is the coldest month in Helsinki?

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

What is the snowiest month in Helsinki?

The month with the most snowfall is February when 230mm (9.06") of snow is typically aggregated.

What months are the sea coldest in Helsinki?

Months with the coldest seawater in Helsinki, Finland, are February and March, with an average sea temperature of 1°C (33.8°F).

What is the driest month in Helsinki?

April is the month with the least rainfall in Helsinki, Finland. Rain falls for 11 days and accumulates 32mm (1.26") of precipitation.

When it does not snow in Helsinki?

April through October are months without snowfall in Helsinki, Finland.

When are the longest days in Helsinki?

With an average of 18.8h of daylight, June has the longest days of the year in Helsinki, Finland.

What month has the most sunshine in Helsinki?

The month with the most sunshine is June, with an average of 9.9h of sunshine.

What are the months with the highest UV index in Helsinki?

June and July, with an average maximum UV index of 5, are months with the highest UV index in Helsinki, Finland.

What is the warmest month in Helsinki?

July is the warmest month in Helsinki, Finland, 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 wettest month in Helsinki?

The month with the most rainfall is August when the rain falls for 15 days and typically aggregates up to 80mm (3.15") of precipitation.

When is the sea warmest in Helsinki?

The month with the warmest seawater is August, with an average sea temperature of 16°C (60.8°F).

What is the month with the shortest days in Helsinki?

December has the shortest days of the year, with an average of 6h of daylight.

What is the month with the least sunshine in Helsinki?

The month with the least sunshine is December, with an average of 0.9h of sunshine.
Average temperature - Helsinki, Finland
Average rainfall - Helsinki, Finland
Average rainfall days - Helsinki, Finland
Average snowfall - Helsinki, Finland

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

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

The month with the longest days is June (Average daylight: 18.8h).
The month with the shortest days is December (Average daylight: 6h).

The month with the most sunshine is June (Average sunshine: 9.9h).
The month with the least sunshine is December (Average sunshine: 0.9h).

Average UV index - Helsinki, Finland