Yankton County Climate
Yankton County, South Dakota
Avg Annual Temp
48.7°F
Annual Precip
28.7"
Annual Snowfall
38.1"
Extreme Heat Days
32.8
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Yankton County Weather
Temperate and Humid for the Plains
Yankton County averages 48.7°F annually, making it one of the more temperate areas in South Dakota. Its 28.7 inches of precipitation is significantly higher than most regional peers.
Warmer and Wetter Than Average
Yankton exceeds the state average temperature of 45.6°F and the state precipitation average of 22.7 inches. This combination makes it one of the most productive agricultural counties.
The Wettest of the Comparison Group
With 28.7 inches of annual precipitation, Yankton is much wetter than Stanley or Walworth. This extra moisture supports a lush landscape compared to the drier western plains.
Humid Summers and Snowy Winters
July is warm at 75.4°F with 33 days of extreme heat per year. Winter is manageable but active, featuring a 20.2°F January average and 38.1 inches of snow.
Plan for High Summer Humidity
Dehumidification and high-capacity cooling are essential for the 73.1°F summer months. Prepare for varied winter weather that regularly drops nearly 40 inches of total snow.
Frequently Asked Questions
What is the average temperature in Yankton County?
How much rain does Yankton County get?
Does it snow in Yankton County?
How hot does Yankton County get in summer?
How cold are winters in Yankton County?
Track your own weather in Yankton County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
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.