Elmore County Climate
Elmore County, Idaho
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
52.6°F
Annual Precip
10.6"
Annual Snowfall
—
Extreme Heat Days
66
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
3,197
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Elmore County
Climate Verdict
Elmore County has a mild, with an average annual temperature of 52.6°F, arid conditions receiving just 10.6 inches of precipitation annually, significant summer heat with 65.7 days annually above 90°F. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 31.8°F. summers are warm — July averages 77.1°F. The 45°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Elmore County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Elmore County is 6.1°F warmer than the Idaho statewide average of 46.5°F, it is also noticeably drier, receiving 6.4 inches less precipitation than the state average, the county experiences 35.50501581751581 more extreme heat days than the state average.
Climate Profile
About Elmore County Weather
Warmer and Drier Than National Norms
Elmore County features an annual average temperature of 52.6°F, which is much closer to the national median than most Idaho counties. Its climate is classified by long, hot summers and relatively mild winters.
One of the Warmest Spots in Idaho
With an annual average of 52.6°F, Elmore County is significantly warmer than the state average of 46.5°F. It is also quite dry, receiving only 10.6 inches of precipitation annually compared to the state's 17.0-inch average.
Beating the Heat of the Snake River Plain
Elmore is warmer than neighboring Gem County, which averages 49.7°F. It also experiences far more extreme heat days than northern neighbors like Clearwater.
Hot Summers and Mild Desert Winters
July is hot with an average of 77.1°F, contributing to a staggering 66 days per year of temperatures over 90°F. While snowfall data is limited, winters are relatively mild with a January average of 31.8°F.
Prepare for Intense Summer Heat
Reliable air conditioning is a must for the 66 days of extreme heat each year. Residents should also focus on water conservation given the low 10.6-inch annual precipitation rate.
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.