Blaine County Climate
Blaine County, Montana
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
43.0°F
Annual Precip
13.2"
Annual Snowfall
26.1"
Extreme Heat Days
22
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
4a
Minimum winter temperature range for plant survival
1,927
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Blaine County
Climate Verdict
Blaine County has a cool, averaging 43.0°F annually, arid conditions receiving just 13.2 inches of precipitation annually, occasional hot days — 22.28 per year above 90°F, moderate snowfall of 26.1 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 18.2°F. summers are pleasantly cool with July averaging 68.3°F. Residents experience a substantial 50°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Blaine County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Blaine County closely matches the Montana statewide average temperature of 43.7°F, it is somewhat drier than average for Montana.
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 sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.