San Miguel County Climate
San Miguel County, Colorado
Avg Annual Temp
43.4°F
Annual Precip
18.4"
Annual Snowfall
88.9"
Extreme Heat Days
5.400000000000001
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About San Miguel County Weather
High country: cold alpine climate with steady snow
San Miguel County's 43.4°F annual average is 3.1°F cooler than the national median of 46.5°F, placing it in the cool alpine continental zone typical of Colorado's mountain counties. With 18.4 inches of annual precipitation and 88.9 inches of snowfall, San Miguel captures significant winter moisture while maintaining moderate overall precipitation.
Colorado mountain county with steady snow profile
San Miguel's 43.4°F ranks it among Colorado's cooler counties, sitting 2.6°F below the state average of 46.0°F, with substantial snowfall (88.9 inches) typical of the southwestern mountains. The county's 8,000+ foot elevation places it firmly in Colorado's alpine climate zone.
Snow bridge between high and lower peaks
San Miguel's 43.4°F and 88.9 inches of snow fall between Routt County's extreme 142.9 inches to the north and San Juan County's 172.6 inches to the south. Its temperature sits between Rio Blanco's 45.0°F to the northeast and the much colder San Juan's 34.7°F to the south.
Cool summers, long winters, substantial snowfall
San Miguel records only 5 extreme heat days annually, while winters average 24.8°F with January at 23.5°F and July reaching 64.8°F. Summer temperatures average 62.4°F with 88.9 inches of annual snowfall creating an extended 7+ month winter/shoulder season.
Mountain living: heating and snow are year-round
With 88.9 inches of annual snowfall and winter temperatures near 25°F, residents need robust heating systems, advanced weatherproofing, and professional snow management for most of the year. The only 5 extreme heat days annually means air conditioning is unnecessary, but summer planning around avalanche terrain and mountain weather unpredictability is essential.
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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.