Alaska, USA: Annual Weather Averages July is the hottest month in Alaska with an average temperature of 22°C (72°F) and the coldest is January at -5°C (23°F) . By July, daytime temperatures in the Interior can average in the 70 °F range– although it has been known to reach well into the 90s – while temperatures in the coastal areas and higher elevations rarely get above 65 °F. Much of the southern parts are temperate rainforest. The climate in Juneau and the southeast panhandle is a mid-latitude oceanic climate (Köppen climate classification Cfb) in the southern sections and an oceanic, marine subpolar climate (similar to Scotland, or Haida Gwaii), (Köppen Cfc) in the northern parts. Average monthly precipitation is … Annual average temperature; High °F Low °F Place High °C Low °C; 38: 17: Fairbanks: 3-8: 38: 18: McKinley Park: 3-8: 36: 15: Tanana: 2-9: 37: 13: Tok: 3-11 Monthly averages Anchorage Longitude: -149.9, Latitude: 61.2181 Average weather Anchorage, AK - 99502. On an annual basis, southern portions are both the wettest and warmest part of Alaska, with milder temperatures in the winter and high precipitation throughout the year. Station Data. The wettest month is August with an average … Monthly: 1981-2010 normals