Near the Polar Circle, Vaasa falls in continental subarctic climate (Köppen: Dfc) with severe dry winters and almost warm summers. The prevailing direction of the winds, North Atlantic Current and the proximity of the Gulf of Bothnia give the climate a certainly livability in spite of the latitude, similar to the south of Alaska, where continentality, proximity to the poles and moderation intersect. The Föhn wind, for example, passes over the Scandinavian Mountains and leaves a milder and drier weather in the lee of the mountains where Vaasa is found, affecting especially in the winter which explains sunny days even in the season of short solar duration.