Madison County Climate
Madison County, Idaho
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
44.4°F
Annual Precip
12.3"
Annual Snowfall
—
Extreme Heat Days
17
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
1,897
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Madison County
Climate Verdict
Madison County has a cool, averaging 44.4°F annually, arid conditions receiving just 12.3 inches of precipitation annually, rare extreme heat with only 17 days above 90°F annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 21.1°F. summers are pleasantly cool with July averaging 68.3°F. The 47°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Madison County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Madison County closely matches the Idaho statewide average temperature of 46.5°F, it is somewhat drier than average for Idaho.
Climate Profile
About Madison County Weather
A Chilly High-Altitude Climate
Madison averages 44.4°F, notably cooler than the national median. This high-altitude region stays dry with just 12.3 inches of annual precipitation.
Cooler Than the Idaho Average
The county ranks among the colder regions of Idaho, falling below the state average of 46.5°F. Its mountain-influenced weather keeps annual temperatures strictly temperate year-round.
Eastern Idaho's Dry Cold
Madison shares a chilly profile with its eastern neighbors but remains drier than the state average of 17 inches. Nearby regions often mirror these high-elevation weather patterns.
Mild Summers and Biting Winters
Summers are mild with a July average of 68.3°F, while winters dip to a 22.7°F average. Residents experience roughly 17 days over 90°F each year.
Winterize for High-Country Living
Invest in high-quality insulation to handle the brisk 21.1°F January lows. While local snowfall data is limited, prepare for variable road conditions across the Teton foothills.
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.