Washington County Climate
Washington County, Colorado
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
49.8°F
Annual Precip
16.3"
Annual Snowfall
33.0"
Extreme Heat Days
45
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5b
Minimum winter temperature range for plant survival
2,890
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Washington County
Climate Verdict
Washington County has a cool, averaging 49.8°F annually, semi-arid conditions with only 16.3 inches of annual precipitation, occasional hot days — 45.425 per year above 90°F, moderate snowfall of 33.0 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 28.6°F. summers are warm — July averages 74.2°F. The 46°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Washington County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Washington County is 4.0°F warmer than the Colorado statewide average of 45.9°F, the county experiences 18.80896573444193 more extreme heat days than the state average.
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 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.