Gem County Climate
Gem County, Idaho
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
49.7°F
Annual Precip
17.9"
Annual Snowfall
7.4"
Extreme Heat Days
52
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
2,572
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Gem County
Climate Verdict
Gem County has a cool, averaging 49.7°F annually, semi-arid conditions with only 17.9 inches of annual precipitation, occasional hot days — 51.849999999999994 per year above 90°F, light snow averaging 7.4 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 28.7°F. summers are warm — July averages 73.1°F. The 44°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Gem County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Gem County is 3.2°F warmer than the Idaho statewide average of 46.5°F, the county experiences 21.655015817515807 more extreme heat days than the state average.
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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Track your own weather in Gem County
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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.