Washington County Climate
Washington County, Colorado
Avg Annual Temp
49.8°F
Annual Precip
16.3"
Annual Snowfall
33.0"
Extreme Heat Days
45.425
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Washington County Weather
Washington mirrors America's average temperature
Washington County averages 49.8°F annually, essentially matching the U.S. median of 47°F with a slight regional warm edge. At 16.3 inches of annual precipitation, the county sits just below the national average, maintaining semi-arid plains conditions.
One of Colorado's warmest eastern counties
Washington's 49.8°F average ranks it 3.8°F above Colorado's state mean of 46.0°F, making it one of the state's warmer locations. This elevation and latitude advantage positions it similarly to neighboring Sedgwick County.
Tied with Sedgwick, warmer than Weld
Washington County's 49.8°F matches Sedgwick County exactly, while both run warmer than Weld County's 48.6°F. All three northeastern counties share similar extreme heat exposure, with Washington recording 45 days per year above 90°F.
Moderate continental with dry summers
Washington experiences a 45-degree annual temperature swing, from January's 28.6°F to July's 74.2°F, typical of high plains climate patterns. The county records 33.0 inches of snow and 45 extreme heat days annually, creating demand for both winter and summer resilience.
Air conditioning essential, winter backup critical
With 45 days reaching 90°F+, effective cooling is non-negotiable for Washington County residents and businesses. Snow averaging 33 inches annually and winter lows near 29°F require dependable heating, while the dry climate demands attention to dust and wind protection during spring 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.