Adams County Climate
Adams County, Idaho
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
45.3°F
Annual Precip
23.4"
Annual Snowfall
—
Extreme Heat Days
39
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
1,981
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Adams County
Climate Verdict
Adams County has a cool, averaging 45.3°F annually, semi-arid conditions with only 23.4 inches of annual precipitation, occasional hot days — 38.55 per year above 90°F. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 22.7°F. summers are pleasantly cool with July averaging 69.3°F. The 47°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Adams County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Adams County closely matches the Idaho statewide average temperature of 46.5°F, it is also noticeably wetter, receiving 6.5 inches more precipitation than the state average.
Climate Profile
About Adams County Weather
A cooler high-elevation climate profile
At 45.3°F, Adams County averages nearly eight degrees cooler than the national median temperature. This reflects its position within the rugged transitions of the West Central Mountains.
Trailing the Idaho temperature average
The county sits slightly below the state average annual temperature of 46.5°F. It experiences a more traditional mountain climate compared to the warmer valleys to the south.
Higher precipitation than valley neighbors
Adams County receives 23.4 inches of annual precipitation, making it significantly wetter than Ada County. Its summer average of 65.7°F offers a much cooler escape than the nearby Treasure Valley.
Brisk winters and pleasant summers
Winter temperatures dip to a chilly average of 22.7°F in January. While local snowfall data is limited, the county still sees 39 days of heat above 90°F during the peak summer months.
Prepare for wet and variable weather
Reliable four-wheel drive and heavy winter gear are vital for the 24.9°F average winter lows. Property owners should manage drainage carefully to handle the 23.4 inches of annual rain and snowmelt.
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.