The week of 30 June 2025 - 6 July 2025 had an average daily temperature of 20 °C (68 °F) and a minimum (nighttime) temperature of 12 °C (54 °F). Both the daily and night temperatures in Helsinki are roughly same as the long-term average, which is around 20 °C (68 °F) and 12 °C (54 °F) respectively. The average temperatures during different times of day (local time) were following: 7am 14 °C (57 °F), 10am 17 °C (63 °F), 1pm 18 °C (64 °F), 4pm 19 °C (66 °F), 7pm 18 °C (64 °F), 10pm 15 °C (59 °F).

The week had 3 days without rain, 1 day with light rain and 3 days with moderate rain. During the whole week, total of 23 mm (0.91 in) of precipitation was observed, which is above the long term average for Helsinki, which is 14 mm (0.55 in). During the daytime (from dawn to dusk), there was 28 % cloud coverage on average. Meteorologically speaking, mist was observed.

Average speed of wind was 6.2 m/s. The air pressure was 998 hpa - 1013 hpa. The air in Helsinki had an average humidity of 73 %.

On average, there were 12.5 hours clear skies, 1 hour partially overcast skies, 4 hours overcast skies and 2.5 hours rainy weather during the daytime (from dawn to dusk). Average time of sunrise was 04:02, average time of sunset was 22:45.

Weather overview

Helsinki (Finland) in general has a mild continental climate. Temperatures during the day are in the range from -2 °C (28 °F) in February to 22 °C (71 °F) in July. Temperatures during the night go from -8 °C (18 °F) in February to 14 °C (57 °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 day temperature continues to descent, with its value of -1 °C (29 °F) in Helsinki, and the night temperature continues to descent too, with its value of -7 °C (20 °F). The maximum of the wind speed can be noticed, its value is 5.

February weather

The minimum of the day temperature can be noticed, its value is -2 °C (28 °F) in Helsinki, and the minimum of the night temperature is observable too, with its value being -8 °C (18 °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 number of sun hours (without clouds) starts to rise, its value is 2 hours.

March weather

The day temperature starts to rise, with its value of 2 °C (35 °F) in Helsinki, and the beginning of the rise of the night temperature could be noticed too, with its value being -5 °C (24 °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 8 °C (46 °F) in Helsinki, and the night temperature continues to rise too, the value of this measure is 0 °C (32 °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 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 day temperature continues to rise, its value is 15 °C (58 °F), and the rise of the night temperature can be observed too, with its value being 6 °C (42 °F). The minimum of the number of rainy days is observable. The humidity reaches its minimum.

June weather

The day temperature continues to rise, with its value being 19 °C (65 °F) in Helsinki. 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 22 °C (71 °F) in Helsinki, and the maximum of the night temperature is observable too. 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.

August weather

The tourist season is close to its peak in Helsinki. The day temperature starts to descent, the value of this measure is 20 °C (68 °F), and the night temperature descent's start could be observed too, its value is 12 °C (54 °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.

September weather

The day temperature descents similarly to the previous month, its value is 14 °C (58 °F) in Helsinki, and the night temperature continues to descent too, its value is 8 °C (46 °F). The rainfall amount descent's start could be observed in September. 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 9 °C (48 °F) in Helsinki, and the descent of the night temperature can be observed as well, the value of this measure is 4 °C (39 °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 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 4 °C (38 °F) in Helsinki, and the descent of the night temperature can be observed as well, with its value being -1 °C (31 °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 humidity reaches its maximum in this month.

December weather

The descent of the day temperature can be observed in Helsinki, and the night temperature descents similarly to the previous month as well, the value of this measure is -5 °C (24 °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 minimum of the day length can be noticed in December.

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 19 °C (65 °F), but others will feel perfectly fine. The temperature of 10 °C (51 °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 22 °C (71 °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 °C (46 °F). The nights will be cool, layers of clothes will be needed for evening and morning walks, the hotel should be equipped with heating.