Riley County Climate
Riley County, Kansas
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
54.6°F
Annual Precip
33.1"
Annual Snowfall
15.9"
Extreme Heat Days
53
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6b
Minimum winter temperature range for plant survival
4,060
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Riley County
Climate Verdict
Riley County has a mild, with an average annual temperature of 54.6°F, moderate rainfall of 33.1 inches per year, occasional hot days — 52.625 per year above 90°F, light snow averaging 15.9 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 29.0°F. summers are warm — July averages 79.2°F. Residents experience a substantial 50°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Riley County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Riley County closely matches the Kansas statewide average temperature of 54.8°F, it is somewhat wetter than average for Kansas.
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.
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.