Madison County Climate
Madison County, Montana
Avg Annual Temp
43.9°F
Annual Precip
13.2"
Annual Snowfall
45.7"
Extreme Heat Days
12.1
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Madison County Weather
High Altitude Cool and Steady Precip
Madison County's average annual temperature of 43.9°F reflects its high-elevation geography and northern latitude. It receives 13.2 inches of precipitation, placing it on the drier side of the national spectrum.
Typical Montana Temperatures and Snow
The county's 43.9°F average is nearly identical to the Montana state average of 43.7°F. However, it receives 45.7 inches of snow, which is higher than several of its central Montana counterparts.
Colder and Snowier Than Lewis and Clark
Madison County records 45.7 inches of snow, roughly 13 inches more than Lewis and Clark County. It also sees fewer extreme heat days, with only 12 days hitting 90°F compared to 15 in the state capital area.
Temperate Summers and Bracing Winters
Summer averages a comfortable 62.9°F, making it one of the cooler summer retreats in the state. Winters are consistent, with January lows averaging 25.4°F and snowfall peaking between December and February.
Focus on Winter Prep and Low Heat
With only 12 extreme heat days, air conditioning is less critical than high-performance heating and snow tires. The 45.7 inches of annual snow requires regular maintenance and proper roof structural considerations.
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.