Blaine County Climate
Blaine County, Montana
Avg Annual Temp
43.0°F
Annual Precip
13.2"
Annual Snowfall
26.1"
Extreme Heat Days
22.28
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Blaine County Weather
Northern Latitude Brings a Brisk Climate
Blaine County averages 43.0°F annually, placing it well below the median temperatures seen across the United States. Its position on the northern plains ensures a consistently cool environment.
Mirroring the Montana Average
The county's average temperature of 43.0°F sits right near the Montana state average of 43.7°F. It serves as a representative sample of the state's typical thermal profile.
Dry Conditions on the High Plains
With only 13.2 inches of annual precipitation, Blaine is drier than the state average of 15.4 inches. It shares this arid characteristic with many counties along the Hi-Line.
Sharp Temperature Swings Between Seasons
January averages a cold 18.2°F, while July heats up to 68.3°F. The county experiences 22 extreme heat days and accumulates about 26.1 inches of snow each year.
Plan for Arid Cold and Sun
Residents need high-quality winter layers for the 20.1°F winter average. Because of the 13.2 inches of annual rain, water-efficient landscaping is a smart choice for local homeowners.
Frequently Asked Questions
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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.