Frostline.info

Frost line depth in Wisconsin

Estimated frost depth in typical soil runs from 40″ to 55″ across Wisconsin's 72 counties. Pick your county or enter a ZIP code for a local estimate.

Deepest frost

  1. Sawyer County 55″
  2. Oneida County 53″
  3. Douglas County 53″
  4. Ashland County 53″
  5. Burnett County 53″

Mildest

  1. Milwaukee County 40″
  2. Racine County 41″
  3. Kenosha County 41″
  4. Walworth County 41″
  5. Sheboygan County 41″

Frost depth by county

CountyEst. frost (typical soil)Typical code range
Adams County47″42–60″
Ashland County53″42–66″
Barron County51″42–66″
Bayfield County51″42–66″
Brown County46″36–60″
Buffalo County49″42–60″
Burnett County53″42–66″
Calumet County45″36–54″
Chippewa County50″42–60″
Clark County51″42–66″
Columbia County45″36–54″
Crawford County45″36–54″
Dane County44″36–54″
Dodge County44″36–54″
Door County44″36–54″
Douglas County53″42–66″
Dunn County50″42–60″
Eau Claire County50″42–60″
Florence County52″42–66″
Fond du Lac County45″36–54″
Forest County51″42–66″
Grant County44″36–54″
Green County44″36–54″
Green Lake County46″36–60″
Iowa County45″36–60″
Iron County52″42–66″
Jackson County50″42–60″
Jefferson County44″36–54″
Juneau County47″42–60″
Kenosha County41″36–54″
Kewaunee County43″36–54″
La Crosse County48″42–60″
Lafayette County44″36–54″
Langlade County50″42–60″
Lincoln County52″42–66″
Manitowoc County42″36–54″
Marathon County49″42–60″
Marinette County46″36–60″
Marquette County46″36–60″
Menominee County47″42–60″
Milwaukee County40″36–54″
Monroe County49″42–60″
Oconto County47″42–60″
Oneida County53″42–66″
Outagamie County45″36–60″
Ozaukee County43″36–54″
Pepin County49″42–60″
Pierce County49″42–60″
Polk County52″42–66″
Portage County48″42–60″
Price County52″42–66″
Racine County41″36–54″
Richland County46″36–60″
Rock County42″36–54″
Rusk County50″42–60″
Sauk County46″36–60″
Sawyer County55″48–66″
Shawano County47″42–60″
Sheboygan County41″36–54″
St. Croix County50″42–66″
Taylor County52″42–66″
Trempealeau County50″42–60″
Vernon County47″42–60″
Vilas County52″42–66″
Walworth County41″36–54″
Washburn County52″42–66″
Washington County44″36–54″
Waukesha County42″36–54″
Waupaca County46″36–60″
Waushara County47″42–60″
Winnebago County45″36–60″
Wood County48″42–60″

Common questions

What is the frost line depth in Wisconsin?

It ranges from about 40 inches in the mildest county to 55 inches in the coldest, in typical soil.

Which Wisconsin county has the deepest frost?

Sawyer County, at about 55 inches in typical soil.