Frostline.info

Frost line depth in Louisiana

Estimated frost depth in typical soil runs from 3″ to 9″ across Louisiana's 64 counties. Pick your county or enter a ZIP code for a local estimate.

Deepest frost

  1. Union Parish 9″
  2. Claiborne Parish 9″
  3. Bossier Parish 9″
  4. East Carroll Parish 8″
  5. Caddo Parish 8″

Mildest

  1. Terrebonne Parish 3″
  2. St. Mary Parish 4″
  3. Lafourche Parish 4″
  4. Assumption Parish 4″
  5. Plaquemines Parish 4″

Frost depth by county

CountyEst. frost (typical soil)Typical code range
Acadia Parish5″12–18″
Allen Parish5″12–18″
Ascension Parish4″12″ minimum
Assumption Parish4″12″ minimum
Avoyelles Parish6″12–18″
Beauregard Parish5″12–18″
Bienville Parish8″12–18″
Bossier Parish9″12–18″
Caddo Parish8″12–18″
Calcasieu Parish5″12–18″
Caldwell Parish7″12–18″
Cameron Parish5″12–18″
Catahoula Parish7″12–18″
Claiborne Parish9″12–18″
Concordia Parish7″12–18″
De Soto Parish7″12–18″
East Baton Rouge Parish5″12–18″
East Carroll Parish8″12–18″
East Feliciana Parish6″12–18″
Evangeline Parish5″12–18″
Franklin Parish8″12–18″
Grant Parish7″12–18″
Iberia Parish4″12–18″
Iberville Parish5″12–18″
Jackson Parish8″12–18″
Jefferson Davis Parish5″12–18″
Jefferson Parish4″12″ minimum
Lafayette Parish4″12–18″
Lafourche Parish4″12″ minimum
LaSalle Parish7″12–18″
Lincoln Parish8″12–18″
Livingston Parish5″12–18″
Madison Parish8″12–18″
Morehouse Parish8″12–18″
Natchitoches Parish6″12–18″
Orleans Parish4″12″ minimum
Ouachita Parish8″12–18″
Plaquemines Parish4″12″ minimum
Pointe Coupee Parish5″12–18″
Rapides Parish6″12–18″
Red River Parish7″12–18″
Richland Parish8″12–18″
Sabine Parish6″12–18″
St. Bernard Parish4″12″ minimum
St. Charles Parish4″12″ minimum
St. Helena Parish6″12–18″
St. James Parish4″12–18″
St. John the Baptist Parish5″12–18″
St. Landry Parish5″12–18″
St. Martin Parish5″12–18″
St. Mary Parish4″12″ minimum
St. Tammany Parish5″12–18″
Tangipahoa Parish5″12–18″
Tensas Parish7″12–18″
Terrebonne Parish3″12″ minimum
Union Parish9″12–18″
Vermilion Parish5″12–18″
Vernon Parish6″12–18″
Washington Parish6″12–18″
Webster Parish8″12–18″
West Baton Rouge Parish5″12–18″
West Carroll Parish8″12–18″
West Feliciana Parish6″12–18″
Winn Parish7″12–18″

Common questions

What is the frost line depth in Louisiana?

It ranges from about 3 inches in the mildest county to 9 inches in the coldest, in typical soil.

Which Louisiana county has the deepest frost?

Union Parish, at about 9 inches in typical soil.