Blaine County Climate
Blaine County, Idaho
Avg Annual Temp
41.3°F
Annual Precip
15.2"
Annual Snowfall
73.8"
Extreme Heat Days
13.4
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Blaine County Weather
A high-altitude, cold-weather destination
Blaine County's 41.3°F average temperature is over 10 degrees colder than the national median. This reflects its rugged mountain geography and famous high-elevation resorts.
Much colder than the Idaho norm
At five degrees below the state average of 46.5°F, Blaine is one of Idaho's chillier regions. The county is defined by its long, cold winters rather than its short summers.
Snowier than the southern valleys
With 73.8 inches of annual snow, Blaine is much snowier than neighboring Bingham County. It also stays significantly cooler during the summer, with far fewer 90-degree days.
Heavy snow and limited heat
Winter is the dominant season, bringing an average of 19.5°F in January and nearly 74 inches of snow. Summers are very mild, with only 13 days of extreme heat over 90°F.
Top-tier winter readiness is required
Residents need heavy-duty snow removal equipment and specialized winter tires to manage 73.8 inches of snow. Home heating systems must be reliable enough to handle winter averages of 21.0°F.
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.