Rio Blanco County Climate
Rio Blanco County, Colorado
Avg Annual Temp
45.0°F
Annual Precip
14.3"
Annual Snowfall
47.1"
Extreme Heat Days
29.3
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Rio Blanco County Weather
Rio Blanco matches Colorado's cool mountain profile
Rio Blanco County's 45.0°F annual average falls 1.5°F below the national median of 46.5°F, placing it squarely in the cool, continental mountain climate zone typical of Colorado's high-elevation interior. With 14.3 inches of annual precipitation, Rio Blanco is slightly drier than the national average of 18.2 inches.
Slightly cooler than Colorado's state average
Rio Blanco's 45.0°F annual temperature sits nearly 1°F below Colorado's state average of 46.0°F, making it one of the state's cooler counties outside the highest mountain ranges. The county's northwest location places it in the transition between plains and mountains.
Mountain edge between plains and high country
Rio Blanco's 45.0°F sits between the warmer plains counties like Prowers (53.5°F) to the east and the much colder San Juan County (34.7°F) to the southwest. It closely matches Routt County's 41.6°F to the north, reflecting similar high-elevation plateau conditions.
Cool summers, cold winters, steady snowfall
Summer temperatures average just 66.9°F with only 29 days exceeding 90°F, while winters plunge to 22.1°F with 47.1 inches of annual snowfall. January averages 19.3°F and July reaches 69.9°F, creating a compressed temperature range typical of higher elevations.
Year-round winter preparedness is the priority
With 47.1 inches of snow annually and winter averages near 22°F, residents need robust heating systems and year-round road maintenance vigilance, particularly in autumn and spring shoulder seasons. The brief, cool summers (66.9°F average) mean air conditioning is minimal, but heavy insulation and weatherproofing are essential for the long, cold winter months.
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.