Cabins/RV Parks - Arctic Alaska

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CLIMATE

Southeastern Alaska and the flanks of the Coast Ranges in south central Alaska, as well as the Aleutians, are characterized by a maritime climate. Some areas have a mean annual precipitation of more than 5,080 mm (200 in), with 1,651 mm (65 in) being normal for low-lying places. Temperatures are relatively mild in winter and usually are cool in summer. Juneau has average temperatures of -5 deg C (23 deg F) in January and 13 deg C (56 deg F) in July; the city receives about 1,016 mm (40 in) of moisture each year.

The lowlands along the lower Yukon and Kuskokwim rivers, the Cook Inlet area, the Copper River basin, and the southern Seward Peninsula have a transitional climate, with warm summers, cool winters, and precipitation ranging from 305 to 762 mm (12 to 30 in) a year. Summer temperatures are highest in the Copper River basin and decline to the west because of the moderating influence of the Bering Sea. Anchorage has a mean January temperature of -12 deg C (11 deg F) and an average July temperature of 14 deg C (58 deg F); its mean annual precipitation is 371 mm (15 in).

The interior of Alaska is shielded from marine influences by the Alaska and Brooks ranges. Thus it receives only 254-610 mm (10-24 in) of precipitation a year and has long winters, with typical temperatures of -40 deg C (-40 deg F) and occasional periods of several weeks duration when temperatures drop to -57 deg C (-70 deg F). Summers, however, usually are hot--temperatures reach 32 deg C (90 deg F), skies are clear, and sunlight lasts for twenty hours a day. Fairbanks has an average January temperature of -25 deg C (-13 deg F) and a mean July temperature of 16 deg C (61 deg F); it receives about 287 mm (11 in) of precipitation yearly. Northern and northwestern Alaska have arctic climates. This is the region of long, dark winters and short, cool summers, with 24 hours of darkness during part of the winter and 24 hours of daylight during part of the summer. Annual precipitation is low, normally between 203 and 533 mm (8 and 21 in). Winter temperatures are not as low as in the interior, but wind speeds are frequently high, causing extreme chill factors. The Beaufort Sea tends to moderate summer temperatures.