Frostline.info

Frost line depth in Pennsylvania

Estimated frost depth in typical soil runs from 21″ to 39″ across Pennsylvania's 68 counties. Pick your county or enter a ZIP code for a local estimate.

Deepest frost

  1. McKean County 39″
  2. Susquehanna County 39″
  3. Elk County 39″
  4. Forest County 38″
  5. Wayne County 38″

Mildest

  1. Delaware County 21″
  2. Philadelphia County 21″
  3. Montgomery County 25″
  4. Bucks County 25″
  5. York County 27″

Frost depth by county

CountyEst. frost (typical soil)Typical code range
Adams County28″24–36″
Allegheny County33″30–42″
Armstrong County36″30–48″
Beaver County31″24–42″
Bedford County30″24–36″
Berks County29″24–36″
Blair County34″30–42″
Bradford County35″30–42″
Bucks County25″24–30″
Butler County35″30–42″
Cambria County34″30–42″
Cameron County38″30–48″
Carbon County32″30–42″
Centre County34″30–42″
Chester County27″24–36″
Clarion County37″30–48″
Clearfield County38″30–48″
Clinton County35″30–42″
Columbia County33″30–42″
Crawford County37″30–48″
Cumberland County28″24–36″
Dauphin County29″24–36″
Delaware County21″18–30″
Elk County39″30–48″
Erie County36″30–48″
Fayette County32″30–42″
Forest County38″30–48″
Franklin County28″24–36″
Fulton County29″24–36″
Greene County32″30–42″
Huntingdon County31″24–42″
Indiana County35″30–42″
Jefferson County37″30–48″
Juniata County29″24–36″
Lackawanna County38″30–48″
Lancaster County28″24–36″
Lawrence County33″30–42″
Lebanon County29″24–36″
Lehigh County30″24–36″
Luzerne County35″30–42″
Lycoming County33″30–42″
McKean County39″36–48″
Mercer County35″30–48″
Mifflin County30″24–36″
Monongalia County30″24–42″
Monroe County32″30–42″
Montgomery County25″24–30″
Montour County32″30–42″
Northampton County31″24–42″
Northumberland County31″24–42″
Perry County29″24–36″
Philadelphia County21″18–30″
Pike County34″30–42″
Potter County38″30–48″
Schuylkill County32″30–42″
Snyder County30″24–42″
Somerset County32″30–42″
Sullivan County33″30–42″
Susquehanna County39″36–48″
Tioga County38″30–48″
Union County31″24–42″
Venango County37″30–48″
Warren County36″30–48″
Washington County33″30–42″
Wayne County38″30–48″
Westmoreland County33″30–42″
Wyoming County38″30–48″
York County27″24–36″

Common questions

What is the frost line depth in Pennsylvania?

It ranges from about 21 inches in the mildest county to 39 inches in the coldest, in typical soil.

Which Pennsylvania county has the deepest frost?

McKean County, at about 39 inches in typical soil.