Adams County Climate
Adams County, Idaho
Avg Annual Temp
45.3°F
Annual Precip
23.4"
Annual Snowfall
—
Extreme Heat Days
38.55
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.