Gem County Climate
Gem County, Idaho
Avg Annual Temp
49.7°F
Annual Precip
17.9"
Annual Snowfall
7.4"
Extreme Heat Days
51.849999999999994
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Gem County Weather
Mild Winters and Hot Desert Summers
Gem County’s annual average of 49.7°F is slightly cooler than the national median but mild for the region. It is characterized by relatively low snowfall and hot, dry summer months.
Warmer Than the Typical Idaho County
At 49.7°F, Gem County is over 3 degrees warmer than the Idaho state average of 46.5°F. It receives 17.9 inches of annual precipitation, which is very close to the statewide average of 17.0 inches.
Less Snow Than Northern Mountain Peers
Gem County receives only 7.4 inches of snow, a fraction of the 83.3 inches seen in Clearwater County. It also enjoys warmer July temperatures than the state's more mountainous eastern counties.
Hot Summers with Minimal Winter Snow
Summer heat is intense with 52 days reaching 90°F or higher and a July average of 73.1°F. Winters are manageable, featuring a January average of 28.7°F and very little accumulation.
Focus on Summer Cooling Systems
With nearly two months of 90-degree weather, high-efficiency cooling is the top priority for local homes. Winter maintenance is simpler here, as the 7.4 inches of snow requires minimal specialized equipment.
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.