South Dakota climate zones
South Dakota’s 66 counties fall in 2 IECC 2021 climate zones: 5A (18), 6A (48).
Zone 5A: cool-humid
Attic target R60 (ENERGY STAR)Bennett County (Cold) · Bon Homme County (Cold) · Brule County (Cold) · Charles Mix County (Cold) · Clay County (Cold) · Douglas County (Cold) · Gregory County (Cold) · Haakon County (Cold) · Hutchinson County (Cold) · Jackson County (Cold) · Jones County (Cold) · Lyman County (Cold) · Mellette County (Cold) · Stanley County (Cold) · Todd County (Cold) · Tripp County (Cold) · Union County (Cold) · Yankton County (Cold)
Zone 6A: cold-humid
Attic target R60 (ENERGY STAR)Aurora County (Cold) · Beadle County (Cold) · Brookings County (Cold) · Brown County (Cold) · Buffalo County (Cold) · Butte County (Cold) · Campbell County (Cold) · Clark County (Cold) · Codington County (Cold) · Corson County (Cold) · Custer County (Cold) · Davison County (Cold) · Day County (Cold) · Deuel County (Cold) · Dewey County (Cold) · Edmunds County (Cold) · Fall River County (Cold) · Faulk County (Cold) · Grant County (Cold) · Hamlin County (Cold) · Hand County (Cold) · Hanson County (Cold) · Harding County (Cold) · Hughes County (Cold) · Hyde County (Cold) · Jerauld County (Cold) · Kingsbury County (Cold) · Lake County (Cold) · Lawrence County (Cold) · Lincoln County (Cold) · Marshall County (Cold) · McCook County (Cold) · McPherson County (Cold) · Meade County (Cold) · Miner County (Cold) · Minnehaha County (Cold) · Moody County (Cold) · Oglala Lakota County (Cold) · Pennington County (Cold) · Perkins County (Cold) · Potter County (Cold) · Roberts County (Cold) · Sanborn County (Cold) · Spink County (Cold) · Sully County (Cold) · Turner County (Cold) · Walworth County (Cold) · Ziebach County (Cold)