Grand County Climate
Grand County, Colorado
Avg Annual Temp
37.4°F
Annual Precip
17.4"
Annual Snowfall
129.1"
Extreme Heat Days
0.48
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Grand County Weather
Grand County: Colorado's coldest climate
At 37.4°F annual temperature, Grand County runs 8.6°F below the U.S. median of 46°F, placing it firmly in an alpine climate. With 17.4 inches of annual precipitation, the county exceeds Colorado's state average of 16.0 inches, reflecting significant mountain snow accumulation.
Among Colorado's coldest counties
Grand County's 37.4°F annual temperature ranks it among the coldest in Colorado, 8.6°F below the state average of 46.0°F. Its 17.4 inches of precipitation sits slightly above the state average, driven by high-elevation winter snowfall.
Nearly identical to Eagle County
Grand County's 37.4°F climate nearly mirrors Eagle County (37.9°F) to the south, making both counties among Colorado's coldest. Both counties stand in stark contrast to warmer lowland neighbors like Garfield County (48.4°F), reflecting the dramatic elevation differences across the state.
Severe winters, mild summers, zero heat days
January plunges to 14.4°F while July only reaches 59.9°F—a 45.5°F range—with zero days annually at or above 90°F. With 129.1 inches of annual snowfall, Grand County accumulates over 10 feet, making it one of Colorado's snowiest regions.
Year-round winter preparedness essential
Residents must maintain heavy snow removal equipment, emergency supplies, and continuously winterized vehicles for the 129.1 inches of annual snowfall. Insulation, heating efficiency, and cold-weather clothing are non-negotiable; January temperatures averaging 14.4°F demand serious infrastructure investment.
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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.