-2 to 21°C
temperature
2409 hours
sunshine per day
307 mm
rain
179 days
dry
126 days
rain
60 days
snow

Climate of Helsinki

Helsinki has a continental climate. It is warm in the summer and cold in the winter. The average annual temperature for Helsinki is 9° degrees and there is about 306 mm of rain in a year. It is dry for 167 days a year with an average humidity of 82% and an UV-index of 3.

Climate averages for the whole year

  • Day: the average daily temperature during the day is between -2°C and 21°C
  • Night:the average nighttime temperature is between -6°C and 14°C
  • Sea temperature: the sea temperature is between 0°C and 22°C
  • Rain: it rains 126 days and there is a total of approximately 307 mm rainfall
  • Snow: it snows an average of 60 days per year
  • Sun hours: throughout the year there are 2409 sun hours
Maximum temperature: between -2°C and 21°C
Warmest month: 21°C in July
Coldest month: -2°C in January
Night temperature: between -6°C and 14°C
Sea temperature: between 0°C and 22°C
Dry days: 179 days
Days with rain: 126 days
Days with snow: 60 days
Total rain sum: 307 mm
Hours of sunshine: 2409 hours

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Temperature graph

This graph shows the average maximum temperature (red) and minimum temperature (blue) for Helsinki.

Precipitation graph

This graph shows the average amount of rainfall per month for Helsinki.

Climate table of Helsinki

In this climate table you can see at a glance what the average weather per month is for Helsinki. The data has been collected over a 30-year period, from which an average per month has been derived. From year to year the differences may be larger or smaller, but with this climate table you have a good idea of what the weather for Helsinki might be like in a given month.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Day temp. (°C) -2 -2 1 7 13 16 21 20 15 9 5 1
Night temp. (°C) -6 -6 -4 1 7 10 14 14 10 5 2 -2
Water temp. (°C) 3 0 1 2 9 17 22 22 19 12 8 6
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Precipitation (mm) 25 22 22 17 21 23 34 29 25 32 25 32
Days with rain 5 5 8 10 11 12 14 14 12 12 13 10
Days with snow 14 13 12 3 - - - - - 2 4 12
Dry days 12 10 11 17 20 18 17 17 18 17 13 9
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Sun hours per day 2 3 5 8 11 12 12 10 8 5 3 2
Wind force (Bft) 3 3 3 3 3 3 3 3 3 3 3 4
UV-index 1 1 1 3 4 5 5 5 3 2 2 1

Best time to visit Helsinki

The best time to visit Helsinki in Finland is in July and August. In this period you have a pleasant temperature and almost no precipitation. The highest average temperature in Helsinki is 21°C in July and the lowest is -2°C in January. The maximum water temperature is 22°C and the lowest water temperature is 0°C.

Climate of Helsinki by month

What is the average climate in a given month for Helsinki? Click on a month to see all monthly averages for sunshine, maximum and minimum temperatures, percent chance of rain per day, snowfall and number of rainy days.

Helsinki weather experiences

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