Easterly winds give dry, sunny weather (the air must climb the Kjølen mountains), with warmth in summer and cold, clear air in winter. Southwesterly winds are common, bringing moist and mild air from the Atlantic Ocean. Autumn and winter is the wettest season along the coast of Nordland, while April–June on average is the driest. The strongest winds occur in late autumn and winter, as the Atlantic low-pressure systems are strongest then. High-pressure weather can occur in all seasons, and in summer this brings 24-hour sunshine north of the Arctic Circle.