Matanuska-Susitna Borough Climate
Matanuska-Susitna Borough, Alaska
Avg Annual Temp
34.6°F
Annual Precip
19.6"
Annual Snowfall
69.0"
Extreme Heat Days
0.10000000000000002
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Matanuska-Susitna Borough Weather
Subarctic climate far below national averages
The borough maintains a cold subarctic climate with an average annual temperature of 34.6°F. This is approximately 20 degrees cooler than the national median, reflecting its high-latitude position. Residents never experience extreme heat, as the area records zero days reaching 90°F annually.
A typical mid-range Alaska temperature profile
Matanuska-Susitna averages 34.6°F, sitting very close to the statewide annual average of 35.9°F. While it is significantly warmer than the Arctic regions, it remains cooler than the coastal panhandle. This balance places it in the middle tier of Alaska's temperature rankings.
Drier and warmer than coastal neighbors
With 19.6 inches of annual precipitation, this area is much drier than maritime counties like Sitka, which receives over 150 inches. It is notably warmer than the Nome Census Area, which averages a chilly 28.0°F. The borough benefits from a more protected interior-adjacent climate.
Chilly winters and mild, snow-heavy years
Winter temperatures average a cold 14.3°F, contributing to a significant 69 inches of annual snowfall. Summers remain mild with a July average of 58.6°F and no extreme heat days. This cycle ensures a short growing season and long, reliable snow cover for winter recreation.
Winter preparation is a daily requirement
Heavy-duty winter gear and reliable heating systems are essential for the 11.5°F January average. Snow removal equipment is a priority to manage the nearly six feet of snow that falls annually. Air conditioning is rarely necessary as summer temperatures peak at a modest 58.6°F.
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.