Frostline.info

Frost line depth in Minnesota

Estimated frost depth in typical soil runs from 46″ to 65″ across Minnesota's 87 counties. Pick your county or enter a ZIP code for a local estimate.

Deepest frost

  1. Kittson County 65″
  2. Marshall County 63″
  3. Roseau County 63″
  4. Pennington County 61″
  5. Lake of the Woods County 61″

Mildest

  1. Houston County 46″
  2. Winona County 49″
  3. Nobles County 49″
  4. Rock County 49″
  5. Fillmore County 50″

Frost depth by county

CountyEst. frost (typical soil)Typical code range
Aitkin County54″48–66″
Anoka County52″42–66″
Becker County59″48–72″
Beltrami County59″48–72″
Benton County53″42–66″
Big Stone County54″42–66″
Blue Earth County51″42–66″
Brown County50″42–60″
Carlton County54″48–66″
Carver County51″42–66″
Cass County55″48–66″
Chippewa County52″42–66″
Chisago County52″42–66″
Clay County59″48–72″
Clearwater County59″48–72″
Cook County50″42–60″
Cottonwood County50″42–60″
Crow Wing County54″42–66″
Dakota County51″42–66″
Dodge County51″42–66″
Douglas County56″48–72″
Faribault County51″42–66″
Fillmore County50″42–60″
Freeborn County52″42–66″
Goodhue County50″42–60″
Grant County56″48–72″
Hennepin County51″42–66″
Houston County46″36–60″
Hubbard County58″48–72″
Isanti County53″42–66″
Itasca County56″48–72″
Jackson County50″42–60″
Kanabec County53″42–66″
Kandiyohi County53″42–66″
Kittson County65″54–78″
Koochiching County59″48–72″
Lac qui Parle County52″42–66″
Lake County52″42–66″
Lake of the Woods County61″48–72″
Le Sueur County51″42–66″
Lincoln County52″42–66″
Lyon County52″42–66″
Mahnomen County58″48–72″
Marshall County63″54–78″
Martin County50″42–60″
McLeod County51″42–66″
Meeker County52″42–66″
Mille Lacs County53″42–66″
Morrison County54″42–66″
Mower County50″42–60″
Murray County52″42–66″
Nicollet County50″42–60″
Nobles County49″42–60″
Norman County59″48–72″
Olmsted County51″42–66″
Otter Tail County58″48–72″
Pennington County61″48–72″
Pine County54″42–66″
Pipestone County52″42–66″
Polk County60″48–72″
Pope County56″48–72″
Ramsey County51″42–66″
Red Lake County60″48–72″
Redwood County52″42–66″
Renville County52″42–66″
Rice County50″42–60″
Rock County49″42–60″
Roseau County63″54–78″
Scott County51″42–66″
Sherburne County52″42–66″
Sibley County50″42–60″
St. Louis County56″48–72″
Stearns County53″42–66″
Steele County52″42–66″
Stevens County56″48–72″
Swift County54″42–66″
Todd County56″48–72″
Traverse County54″42–66″
Wabasha County50″42–60″
Wadena County58″48–72″
Waseca County53″42–66″
Washington County50″42–66″
Watonwan County50″42–60″
Wilkin County57″48–72″
Winona County49″42–60″
Wright County52″42–66″
Yellow Medicine County51″42–66″

Common questions

What is the frost line depth in Minnesota?

It ranges from about 46 inches in the mildest county to 65 inches in the coldest, in typical soil.

Which Minnesota county has the deepest frost?

Kittson County, at about 65 inches in typical soil.