Grand County Climate
Grand County, Colorado
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
37.4°F
Annual Precip
17.4"
Annual Snowfall
129.1"
Extreme Heat Days
0
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
823
Limited to cold-tolerant varieties
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Grand County
Climate Verdict
Grand County has a cold, with an average annual temperature of 37.4°F, semi-arid conditions with only 17.4 inches of annual precipitation, rare extreme heat with only 0.48 days above 90°F annually, heavy winter snowfall averaging 129.1 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 14.4°F. summers are cool, with July averaging only 59.9°F. The 45°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Grand County is 8.5°F cooler than the Colorado statewide average of 45.9°F, the county experiences 26.136034265558067 fewer extreme heat days than the state average.
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.
Frequently Asked Questions
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Data sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.