Coastal areas have a moderate climate owing to the Gulf Stream and North Atlantic Drift. Inland temperatures are more extreme with warm summers and often very cold winters (November to March). In general, the lowlands of the south and the inland mountains experience colder winters than the coastal areas. Rain is distributed throughout the year with frequent inland snowfalls during the winter. The northern part of the country inside the Arctic Circle has continuous daylight in midsummer, and twilight all day during winter.

European according to the season. Light- to medium-weights are worn in summer. Warmer clothing, gloves and hats are necessary during the winter. Waterproofing is advisable throughout the year.