South Dakota weather by county

South Dakota in September 2026

• 66 of 66 counties ran at least 1° warmer than usual in September 2026, and 0 ran at least 1° cooler.
• Warmest against its own records: Miner County (3rd-warmest September of 132). Even the least warm, Edmunds County, had its 25th-warmest.
• Wettest September against its records: Bon Homme County, 8.1 inches (1st-wettest).
• 13 of 66 counties were in moderate drought or worse on NOAA's Palmer reading for September.
• Since 1970 the state's counties have warmed about 0.4° per decade on average, Harding County the most at 0.6°.

This week's forecast against the usual, and every month since 1895, for all 66 counties in South Dakota. 36 had a top-10 warm September in 2026.

• Aurora County 15th warmest Sep
• Beadle County 11th warmest Sep
• Bennett County 8th warmest Sep
• Bon Homme County 13th warmest Sep
• Brookings County 6th warmest Sep
• Brown County 12th warmest Sep
• Brule County 16th warmest Sep
• Buffalo County 16th warmest Sep
• Butte County 5th warmest Sep
• Campbell County 22nd warmest Sep
• Charles Mix County 14th warmest Sep
• Clark County 7th warmest Sep
• Clay County 11th warmest Sep
• Codington County 7th warmest Sep
• Corson County 15th warmest Sep
• Custer County 5th warmest Sep
• Davison County 8th warmest Sep
• Day County 9th warmest Sep
• Deuel County 6th warmest Sep
• Dewey County 12th warmest Sep
• Douglas County 11th warmest Sep
• Edmunds County 25th warmest Sep
• Fall River County 5th warmest Sep
• Faulk County 19th warmest Sep
• Grant County 8th warmest Sep
• Gregory County 16th warmest Sep
• Haakon County 8th warmest Sep
• Hamlin County 5th warmest Sep
• Hand County 17th warmest Sep
• Hanson County 4th warmest Sep
• Harding County 9th warmest Sep
• Hughes County 14th warmest Sep
• Hutchinson County 5th warmest Sep
• Hyde County 19th warmest Sep
• Jackson County 8th warmest Sep
• Jerauld County 15th warmest Sep
• Jones County 17th warmest Sep
• Kingsbury County 5th warmest Sep
• Lake County 5th warmest Sep
• Lawrence County 5th warmest Sep
• Lincoln County 10th warmest Sep
• Lyman County 17th warmest Sep
• Marshall County 12th warmest Sep
• McCook County 4th warmest Sep
• McPherson County 24th warmest Sep
• Meade County 8th warmest Sep
• Mellette County 17th warmest Sep
• Miner County 3rd warmest Sep
• Minnehaha County 5th warmest Sep
• Moody County 6th warmest Sep
• Oglala Lakota County 5th warmest Sep
• Pennington County 9th warmest Sep
• Perkins County 10th warmest Sep
• Potter County 20th warmest Sep
• Roberts County 8th warmest Sep
• Sanborn County 9th warmest Sep
• Spink County 12th warmest Sep
• Stanley County 9th warmest Sep
• Sully County 15th warmest Sep
• Todd County 13th warmest Sep
• Tripp County 15th warmest Sep
• Turner County 6th warmest Sep
• Union County 9th warmest Sep
• Walworth County 20th warmest Sep
• Yankton County 8th warmest Sep
• Ziebach County 10th warmest Sep

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