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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 17° degrees and there is about 150 inch of rain in a year. It is dry for 137 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 -3°C and 20°C
- Night:the average nighttime temperature is between -6°C and 15°C
- Sea temperature: the sea temperature is between 0°C and 23°C
- Rain: it rains 138 days and there is a total of approximately 380 mm rainfall
- Snow: it snows an average of 88 days per year
- Sun hours: throughout the year there are 2391 sun hours
| Maximum temperature: | between -3°C and 20°C |
| Warmest month: | 20°C in July |
| Coldest month: | -3°C in January |
| Night temperature: | between -6°C and 15°C |
| Sea temperature: | between 0°C and 23°C |
| Dry days: | 139 days |
| Days with rain: | 138 days |
| Days with snow: | 88 days |
| Total rain sum: | 380 mm |
| Hours of sunshine: | 2391 hours |
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.
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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. (°F) | 27 | 28 | 33 | 42 | 55 | 61 | 69 | 67 | 59 | 47 | 40 | 34 |
| Night temp. (°F) | 21 | 22 | 25 | 34 | 45 | 51 | 59 | 58 | 52 | 42 | 36 | 29 |
| Water temp. (°F) | 37 | 33 | 33 | 36 | 48 | 63 | 73 | 74 | 67 | 55 | 47 | 42 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Precipitation (inch) | 13 | 13 | 12 | 9 | 8 | 11 | 15 | 15 | 10 | 14 | 14 | 16 |
| Days with rain | 7 | 6 | 9 | 12 | 11 | 14 | 16 | 15 | 12 | 12 | 13 | 11 |
| Days with snow | 20 | 19 | 18 | 5 | 1 | - | - | - | - | 3 | 6 | 16 |
| Dry days | 4 | 3 | 4 | 13 | 19 | 16 | 15 | 16 | 18 | 16 | 11 | 4 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Sun hours per day | 2 | 3 | 4 | 7 | 10 | 13 | 12 | 10 | 8 | 4 | 3 | 2 |
| Wind force (Bft) | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 |
| UV-index | 1 | 1 | 1 | 3 | 4 | 4 | 5 | 4 | 3 | 2 | 1 | 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 69°F in July and the lowest is 27°F in January. The maximum water temperature is 74°F and the lowest water temperature is 33°F.
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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