Walworth County Climate
Walworth County, South Dakota
Avg Annual Temp
45.0°F
Annual Precip
18.2"
Annual Snowfall
33.6"
Extreme Heat Days
22.399999999999995
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Walworth County Weather
Cold and Dry Northern Plains
Walworth County averages 45.0°F, placing it firmly in the cold-temperate zone. Its 18.2 inches of precipitation is well below the national median, characterizing it as a semi-arid region.
Slightly Cooler Than the State Average
The county's average temperature falls just below the South Dakota average of 45.6°F. It is also significantly drier than the state average for precipitation.
Very Dry Compared to Eastern Peers
With only 18.2 inches of rain, Walworth is much drier than Spink County's 22.8 inches. This limited moisture influences the local vegetation and agricultural choices.
Frigid Januaries and Clear Summers
January is very cold with a 15.2°F average, while summer highs reach a comfortable 70.6°F. The county sees 22 days of extreme heat and 33.6 inches of snow annually.
Invest in Efficient Home Heating
Prioritize home heating efficiency to manage the 18.3°F winter average. Xeriscaping is a practical choice for the yard to thrive in the low 18.2-inch annual rainfall.
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.