Arctic National Wildlife Refuge
Winds reshape the winter landscape

Climate of the Coastal Plain

Conditions Response
Average Summer Temperature (July) 41 degrees F (5 degrees C)
Maximum Summer Temperature 86 degrees F (30 degrees C)
Average Winter Temperature (February) -4 degrees F (-20 degrees C)
Total Cloud Cover 54 % of year
Expected Days of Fog 115 days
Average Annual Rainfall 10 in. (25 cm)
Prevailing Winds at Barter Island 13 knots easterly

The region provides a striking contrast betwen summer and winter. During the summer months temperatures are relatively warm (40 degrees F) and daylight is continuous. During the winter months temperatures drop well below zero degrees F and blowing snow fills in valleys and swales, resulting in the appearance of a vast, white wasteland.