Helsinki weather and climate
Helsinki weather and climate
Day
9 °C
Night
4 °C
Sea
10 °C
Precipitation
75 mm
in month
Rainy days
11 days
in month
Daylight
10 hours
average
Sunshine
3 hours
average
Humidity
85 %
Day
9 °C
Night
4 °C
Sea
10 °C
Precipitation
75 mm
in month
Rainy days
11 days
in month
Daylight
10 hours
average
Sunshine
3 hours
average
Humidity
85 %
Weather charts for Helsinki
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Weather overview for Helsinki
Weather overview
Helsinki (Finland) in general has a mild continental climate. Temperatures during the day are in the range from -2.1 °C (28.2 °F) in February to 21.6 °C (70.9 °F) in July. Temperatures during the night go from -7.6 °C (18.3 °F) in February to 13.7 °C (56.7 °F) in July. The least rainy month in Helsinki is May with its 7 days of rain, the rainiest month is November, when it rains 13 days.
January weather
The descent of the sea temperature can be observed in Helsinki, and the day temperature continues to descent too, with its value of -1.5 °C (29.3 °F). The maximum of the wind speed can be noticed, its value is 4.7. The night temperature continues to descent, with its value of -6.6 °C (20.1 °F).
February weather
The descent of the sea temperature can be observed, the value of this measure is 0.6 °C (33.0 °F) in Helsinki, while the minimum of the day temperature can be noticed, its value is -2.1 °C (28.2 °F). The beginning of the descent of the rainfall amount could be noticed, its value is 37 mm (1.44 in), and the number of rainy days starts to descent too, with its value of 9 days. The minimum of the night temperature is observable, with its value being -7.6 °C (18.3 °F). The number of sun hours (without clouds) starts to rise, its value is 2 hours.
March weather
The sea temperature reaches its minimum, its value is 0.4 °C (32.7 °F) in Helsinki, while the day temperature starts to rise, with its value of 1.5 °C (34.7 °F). The beginning of the rise of the night temperature could be noticed, with its value being -4.6 °C (23.7 °F). The number of rainy days descents similarly to the previous month, with its value of 9 days. The rise of the number of sun hours (without clouds) can be observed, its value is 4 hours.
April weather
The rise of the day temperature can be observed, with its value of 7.8 °C (46.0 °F) in Helsinki, while the beginning of the rise of the sea temperature could be noticed, with its value being 1.8 °C (35.2 °F). The number of rainy days descents similarly to the previous month, while the minimum of the rainfall amount is observable, with its value being 32 mm (1.25 in). The night temperature continues to rise, the value of this measure is 0.1 °C (32.2 °F). The rise of the number of sun hours (without clouds) can be observed, the value of this measure is 5 hours.
May weather
The tourist season is at its beginning in Helsinki. The rise of the sea temperature can be observed, and the day temperature continues to rise too, its value is 14.7 °C (58.5 °F). The minimum of the number of rainy days is observable. The humidity reaches its minimum. The rise of the night temperature can be observed, with its value being 5.7 °C (42.3 °F).
June weather
The day temperature continues to rise, with its value being 18.6 °C (65.5 °F) in Helsinki, and the sea temperature continues to rise as well. The ongoing tourist season is noticeable in June. The beginning of the rise of the number of rainy days could be noticed, its value is 10 days, and the rainfall amount rise's start could be observed too in June. The number of sun hours (without clouds) reaches its maximum, with its value being 9 hours.
July weather
The day temperature reaches its maximum, with its value being 21.6 °C (70.9 °F) in Helsinki, while the rise of the sea temperature can be observed, with its value of 15.8 °C (60.4 °F). The tourist season is taking place. The rainfall amount rises similarly to the previous month, the value of this measure is 62 mm (2.44 in). The minimum of the wind speed is observable in July. The maximum of the night temperature is observable.
August weather
The tourist season is close to its peak in Helsinki. The day temperature starts to descent, the value of this measure is 19.8 °C (67.6 °F), while the sea temperature reaches its maximum, its value is 16.7 °C (62.1 °F). The number of rainy days rise's start could be observed, the value of this measure is 11 days, while the rainfall amount reaches its maximum in August. The night temperature descent's start could be observed, its value is 12.4 °C (54.3 °F).
September weather
The day temperature descents similarly to the previous month, its value is 14.4 °C (57.9 °F) in Helsinki, while the beginning of the descent of the sea temperature could be noticed, with its value of 13.7 °C (56.6 °F). The rainfall amount descent's start could be observed in September. The night temperature continues to descent, its value is 8.0 °C (46.4 °F). The descent of the number of sun hours (without clouds) can be observed, with its value being 4 hours.
October weather
The descent of the day temperature can be observed, with its value being 8.9 °C (48.0 °F) in Helsinki, and the sea temperature continues to descent too, its value is 9.8 °C (49.6 °F). The rainfall amount rise's start could be observed, and the number of rainy days rise's start could be observed too, its value is 11 days. The descent of the night temperature can be observed, the value of this measure is 3.8 °C (38.8 °F). The number of sun hours (without clouds) continues to descent, with its value being 3 hours.
November weather
The day temperature descents similarly to the previous month, its value is 3.5 °C (38.3 °F) in Helsinki, and the descent of the sea temperature can be observed as well, its value is 6.4 °C (43.6 °F). The maximum of the number of rainy days can be noticed, with its value of 13 days, while the beginning of the descent of the rainfall amount could be noticed, the value of this measure is 66 mm (2.61 in). The descent of the night temperature can be observed, with its value being -0.8 °C (30.6 °F). The humidity reaches its maximum in this month.
December weather
The descent of the day temperature can be observed in Helsinki, and the sea temperature continues to descent too, its value is 3.7 °C (38.6 °F). The descent of the rainfall amount can be observed, with its value of 55 mm (2.17 in). The minimum of the number of sun hours (without clouds) is observable in this month. The night temperature descents similarly to the previous month, the value of this measure is -4.7 °C (23.5 °F). The minimum of the day length can be noticed in December.
FAQs
How many sunny hours can I expect in Helsinki in April?
In April in Helsinki, you can expect around 5 hours of sunshine.
What is the average number of rainy days in Helsinki in May?
In May in Helsinki, we can expect 7 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 1.7 days of the week, or in general - 24 % days.
Is June a good month to visit Helsinki?
There are good conditions for visiting in Helsinki in June. You can expect just 10 days of rain during the month, taking an umbrella is not necessary. There are some people, who may feel a slight chill at 18.6 °C (65.5 °F), but others will feel perfectly fine. The temperature of 10.4 °C (50.7 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.
What is the temperature in Helsinki during the day in July?
In July in Helsinki, the average daily temperatures will be 21.6 °C (70.9 °F). A comfortable temperature for most people, where it is neither too cold nor too hot, and a large number of activities can be carried out comfortably, including sunbathing by the water. Lighter clothing will be suitable - shorts, skirts, t-shirts, jackets; a light sweater and long trousers may also be useful.
Is August part of the wet season in Helsinki?
No, there is no wet season in Helsinki in August - you can expect 11 days of rain during the month.
What is the night temperature in Helsinki in September?
The average night temperature in September in Helsinki is 8.0 °C (46.4 °F). The nights will be cool, layers of clothes will be needed for evening and morning walks, the hotel should be equipped with heating.