Frostline.info

Frost line depth in South Dakota

Estimated frost depth in typical soil runs from 39″ to 57″ across South Dakota's 66 counties. Pick your county or enter a ZIP code for a local estimate.

Deepest frost

  1. McPherson County 57″
  2. Campbell County 55″
  3. Brown County 55″
  4. Edmunds County 55″
  5. Day County 55″

Mildest

  1. Fall River County 39″
  2. Custer County 39″
  3. Oglala Lakota County 39″
  4. Lawrence County 40″
  5. Bennett County 40″

Frost depth by county

CountyEst. frost (typical soil)Typical code range
Aurora County48″42–60″
Beadle County52″42–66″
Bennett County40″36–48″
Bon Homme County45″36–54″
Brookings County54″42–66″
Brown County55″48–66″
Brule County47″42–60″
Buffalo County49″42–60″
Butte County46″36–60″
Campbell County55″48–66″
Charles Mix County44″36–54″
Clark County53″42–66″
Clay County46″36–60″
Codington County54″42–66″
Corson County54″48–66″
Custer County39″36–48″
Davison County48″42–60″
Day County55″48–66″
Deuel County52″42–66″
Dewey County53″42–66″
Douglas County45″36–54″
Edmunds County55″48–66″
Fall River County39″36–48″
Faulk County53″42–66″
Grant County53″42–66″
Gregory County44″36–54″
Haakon County47″42–60″
Hamlin County53″42–66″
Hand County51″42–66″
Hanson County47″42–60″
Harding County51″42–66″
Hughes County50″42–60″
Hutchinson County46″36–60″
Hyde County51″42–66″
Jackson County43″36–54″
Jerauld County50″42–60″
Jones County46″36–60″
Kingsbury County51″42–66″
Lake County50″42–60″
Lawrence County40″36–48″
Lincoln County48″42–60″
Lyman County47″42–60″
Marshall County55″48–66″
McCook County48″42–60″
McPherson County57″48–72″
Meade County45″36–54″
Mellette County41″36–54″
Miner County49″42–60″
Minnehaha County50″42–60″
Moody County52″42–66″
Oglala Lakota County39″36–48″
Pennington County42″36–54″
Perkins County53″42–66″
Potter County53″42–66″
Roberts County54″42–66″
Sanborn County49″42–60″
Spink County54″42–66″
Stanley County47″42–60″
Sully County52″42–66″
Todd County41″36–54″
Tripp County43″36–54″
Turner County49″42–60″
Union County46″36–60″
Walworth County54″42–66″
Yankton County47″42–60″
Ziebach County51″42–66″

Common questions

What is the frost line depth in South Dakota?

It ranges from about 39 inches in the mildest county to 57 inches in the coldest, in typical soil.

Which South Dakota county has the deepest frost?

McPherson County, at about 57 inches in typical soil.