Washington County Climate
Washington County, Kansas
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
52.8°F
Annual Precip
31.5"
Annual Snowfall
16.6"
Extreme Heat Days
55
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
3,815
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 mild, with an average annual temperature of 52.8°F, moderate rainfall of 31.5 inches per year, occasional hot days — 55.1 per year above 90°F, light snow averaging 16.6 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 26.1°F. summers are warm — July averages 78.8°F. Residents experience a substantial 53°F difference between winter and summer.
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 closely matches the Kansas statewide average temperature of 54.8°F.
Climate Profile
About Washington County Weather
Balanced moisture in Washington County
Washington County’s 52.8°F average temperature is just below the national median. Its 31.5 inches of annual rainfall is typical for the central United States, providing a balanced moisture profile.
Cold winters in northern Kansas
The county is slightly cooler than the Kansas state average of 54.8°F and matches the state’s precipitation average almost exactly. It experiences a cold January average of 26.1°F, which is lower than many neighboring regions.
Wetter than the western plains
Washington receives much more rain than Wichita or Wallace counties to the west, averaging 10 to 12 inches more precipitation. It is slightly cooler than Wabaunsee County to the southeast.
A mix of heat and freezing cold
Summer brings 55 days of extreme heat over 90°F, while July temperatures average a warm 78.8°F. Winters are the coldest in this set, with a December-to-February average of only 28.7°F.
Priority on high-efficiency heating
Homeowners should prioritize high-efficiency heating systems to combat the cold 28.7°F winter average. Summer planning should account for nearly two months of extreme heat days where temperatures exceed 90°F.
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.