Dolores County Climate
Dolores County, Colorado
Avg Annual Temp
47.1°F
Annual Precip
11.3"
Annual Snowfall
—
Extreme Heat Days
17.75
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Dolores County Weather
Dolores runs cool and dry
At 47.1°F annually, Dolores County sits just above the U.S. median temperature of 46°F, placing it in a semi-arid climate zone. The county receives only 11.3 inches of precipitation yearly—less than a third of the national average of 38.7 inches—making it significantly drier than most American counties.
Slightly warmer than Colorado average
Dolores County's 47.1°F annual temperature ranks it among Colorado's warmer counties, sitting 1.1°F above the state average of 46.0°F. However, its precipitation of 11.3 inches falls well below Colorado's state average of 16.0 inches, marking it as one of the state's driest regions.
Warmer than high-altitude neighbors
Dolores County is notably warmer than nearby Eagle County (37.9°F) and Grand County (37.4°F), which sit at higher elevations in the San Juan and Book Cliffs regions. Its climate more closely mirrors Garfield County (48.4°F) to the northwest, though Dolores receives significantly less precipitation than any of its neighbors.
Mild winters, hot days ahead
January averages 25.8°F while July climbs to 70.6°F, with 18 days annually reaching 90°F or hotter. Snowfall data is limited for the county, but the combination of low precipitation and moderate temperature swings suggests relatively light winter snow cover.
Prepare for heat and drought
Residents should invest in quality air conditioning for the 18 annual heat days and ensure HVAC systems handle dry air efficiently. Water conservation is critical year-round given the 11.3-inch annual precipitation; outdoor landscaping and irrigation systems require careful planning for this semi-arid climate.
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.