Helsinki has four distinct seasons. The light-drenched, warm summer contrasts sharply with the dark, cold winter.
The main tourist season extends from May to September.
You can count on plenty of light, but the weather can vary from torrential rain to long heat waves.
Be prepared for anything!
In summer, the temperature is from +15 to +25 °C, even to +30 °C.
However, rain and northerly winds can cause the temperature to drop suddenly.
It is usually frosty in winter, but there are often temperate days.
The proximity of the sea makes Helsinki a humid city.
This should be taken into account particularly in the spring, when the sea is cold and the chilly wind can cause nasty colds.