Arapahoe County Climate
Arapahoe County, Colorado
Avg Annual Temp
50.8°F
Annual Precip
—
Annual Snowfall
—
Extreme Heat Days
46.6
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Precipitation data coming soon
Seasonal Overview
National Comparison
Data pending
Climate Profile
About Arapahoe County Weather
Arapahoe: Urban heat on the plains
Arapahoe County averages 50.8°F annually, running 4.8 degrees warmer than the U.S. median of 46°F. The county's semi-arid climate and Denver metro location create a warm, dry environment, though detailed precipitation records are limited.
Colorado's warmest tier
At 50.8°F, Arapahoe ranks among Colorado's warmest counties, sitting 4.8 degrees above the state average of 46°F. This reflects its Front Range elevation and the urban heat-island effect from the Denver metropolitan area.
Metro core shapes temperature
Arapahoe (50.8°F) nearly matches adjacent Adams County (50.7°F) and runs significantly warmer than surrounding mountain counties like Boulder (44°F). The metro sprawl creates a distinct warm corridor across the northern Front Range.
Hot summers, quick winters
Summer temperatures average 70.6°F while winters drop to 32.7°F, with 47 days per year reaching 90°F or higher. January averages 32.1°F, and while annual snowfall data is limited, winter precipitation is moderate by plains standards.
Cool homes, lighter winter prep
With 47 annual extreme heat days, air conditioning is essential and high-efficiency systems save significantly on summer costs. Winter demands solid heating but is less severe than mountain counties; water-efficient landscaping suits the dry climate.
Frequently Asked Questions
What is the average temperature in Arapahoe County?
How hot does Arapahoe County get in summer?
How cold are winters in Arapahoe County?
Track your own weather in Arapahoe County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
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.