Sumner County Climate
Sumner County, Kansas
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
56.9°F
Annual Precip
35.9"
Annual Snowfall
8.6"
Extreme Heat Days
67
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
4,429
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Sumner County
Climate Verdict
Sumner County has a mild, with an average annual temperature of 56.9°F, moderate rainfall of 35.9 inches per year, significant summer heat with 67.2 days annually above 90°F, light snow averaging 8.6 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 32.9°F. summers are hot, with July averaging 80.5°F. The 48°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
The moderate temperatures support hiking, cycling, and camping comfortably in spring, summer, and fall.
Regional Context
Sumner County closely matches the Kansas statewide average temperature of 54.8°F, it is also noticeably wetter, receiving 5.6 inches more precipitation than the state average.
Climate Profile
About Sumner County Weather
Warm and Productive Agricultural Climate
Sumner County is notably warmer than the national median, with an annual average temperature of 56.9°F. This climate is characterized by generous rainfall and long growing seasons.
Among the Warmest in Kansas
Sumner exceeds the Kansas average temperature by over two degrees. It is also much wetter than average, receiving 35.9 inches of annual precipitation compared to the state's 30.3 inches.
Wetter and Warmer than West
Sumner is significantly wetter than its neighbor Stevens, receiving about 16 inches more rain per year. It is also the least snowy of this group, averaging only 8.6 inches of snow.
Long Summers and Easy Winters
July is hot with an 80.5°F average, contributing to 67 days of extreme heat. Winters are the mildest in the region, with 35.0°F averages and very little snow.
Manage Heat and High Rainfall
With 67 extreme heat days and 35.9 inches of rain, humidity and cooling costs are your primary concerns. You can skip the heavy snow gear, as the county only sees 8.6 inches of snow annually.
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.