Sumner County Climate
Sumner County, Kansas
Avg Annual Temp
56.9°F
Annual Precip
35.9"
Annual Snowfall
8.6"
Extreme Heat Days
67.2
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.