Washington County Climate
Washington County, Kansas
Avg Annual Temp
52.8°F
Annual Precip
31.5"
Annual Snowfall
16.6"
Extreme Heat Days
55.1
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.