30-year climate normals
Matanuska-Susitna Borough Climate and Weather Averages
Hottest month — July
68.7°average daily high. The coldest month is January, averaging a low of 5.4°F.
Matanuska-Susitna Borough gets 26.51" of precipitation a year, and 45% of it falls in Jul, Aug, Sep.
Temperature through the year
Each bar spans the average daily low to the average daily high for that month.
| Month | Avg high | Avg low | Precip |
|---|---|---|---|
| January | 21.8° | 5.4° | 1.34" |
| February | 28.2° | 9.4° | 1.24" |
| March | 34.6° | 12.4° | 1.08" |
| April | 46.6° | 25.8° | 1.32" |
| May | 58.7° | 36.7° | 1.56" |
| June | 67.1° | 47.0° | 1.71" |
| July | 68.7° | 51.4° | 2.87" |
| August | 65.1° | 47.9° | 4.70" |
| September | 56.0° | 39.0° | 4.48" |
| October | 41.8° | 26.5° | 2.78" |
| November | 27.9° | 13.2° | 1.77" |
| December | 23.4° | 7.8° | 1.66" |
Rainfall by month
Matanuska-Susitna Borough has a distinct wet season. 45% of the year's precipitation arrives in Jul, Aug, Sep.
What this climate costs you
Degree days measure how hard a building has to work to stay comfortable. They are the reason two identical houses have very different power bills, and they are the link between the weather here and what you pay every month.
These are rough planning figures from degree days and the state electricity price, not a bill estimate. House size, insulation and fuel type move them a lot. See the full cost of owning a home in Matanuska-Susitna Borough, where electricity is one line of eight.
Common questions
What is the weather like in Matanuska-Susitna Borough?
Matanuska-Susitna Borough averages a high of 68.7°F in July and a low of 5.4°F in January. Annual precipitation is 26.51 inches, with essentially no snow.
When is the rainy season in Matanuska-Susitna Borough?
The wettest stretch is Jul, Aug, Sep, which accounts for 45% of the year's precipitation. That is a pronounced wet season rather than rain spread evenly through the year.
How hot does it get in Matanuska-Susitna Borough?
The average daily high in July, the hottest month, is 68.7°F. That drives 17 cooling degree days a year, which is what your air conditioning has to work against.
Does it snow in Matanuska-Susitna Borough?
Effectively no. Measurable snowfall is rare in Matanuska-Susitna Borough.
Sources
- Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station TALKEETNA AP, AK US (USW00026528), 19.4 miles from the county centroid.
- Heating and cooling degree days — NOAA, same station and period.
- Electricity price — US Energy Information Administration, Electric Power Monthly Table 5.6.A, Alaska residential average.
- Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.