Madison County Climate
Madison County, Idaho
Avg Annual Temp
44.4°F
Annual Precip
12.3"
Annual Snowfall
—
Extreme Heat Days
17
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.