Riley County Climate
Riley County, Kansas
Avg Annual Temp
54.6°F
Annual Precip
33.1"
Annual Snowfall
15.9"
Extreme Heat Days
52.625
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Riley County Weather
Riley County aligns with the continental median
Riley County maintains an annual average temperature of 54.6°F, placing it squarely in a humid continental climate zone. This temperature closely tracks the national median, offering a traditional four-season experience.
A wet and temperate Kansas standard
The county's 54.6°F average is nearly identical to the Kansas state average of 54.8°F. However, Riley is significantly wetter than the rest of the state, receiving 33.1 inches of annual precipitation compared to the 30.3-inch state benchmark.
The humid edge of the Flint Hills
Riley County is wetter than its western neighbor, Russell County, which receives only 26.0 inches of rain. While temperature profiles remain similar across the region, Riley's proximity to eastern moisture sources increases its annual humidity.
Deep freezes followed by intense summer sun
Residents face 53 days per year with temperatures reaching at least 90°F during the 79.2°F July peaks. Winters are brisk but manageable, averaging 31.6°F with roughly 15.9 inches of annual snowfall.
Prepare for humidity and moderate snow
The combination of high summer humidity and nearly 16 inches of snow requires versatile HVAC systems and reliable de-icing tools. Plan for lush spring growth due to the higher-than-average 33.1 inches of annual rainfall.
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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.