Frost line depth in Massachusetts
Estimated frost depth in typical soil runs from 20″ to 38″ across Massachusetts's 14 counties. Pick your county or enter a ZIP code for a local estimate.
Deepest frost
- Franklin County 38″
- Berkshire County 38″
- Hampshire County 36″
- Worcester County 34″
- Hampden County 32″
Mildest
- Nantucket County 20″
- Dukes County 25″
- Barnstable County 26″
- Bristol County 27″
- Plymouth County 29″
Frost depth by county
| County | Est. frost (typical soil) | Typical code range |
|---|---|---|
| Barnstable County | 26″ | 24–36″ |
| Berkshire County | 38″ | 30–48″ |
| Bristol County | 27″ | 24–36″ |
| Dukes County | 25″ | 24–30″ |
| Essex County | 29″ | 24–36″ |
| Franklin County | 38″ | 30–48″ |
| Hampden County | 32″ | 30–42″ |
| Hampshire County | 36″ | 30–48″ |
| Middlesex County | 31″ | 24–42″ |
| Nantucket County | 20″ | 18–24″ |
| Norfolk County | 30″ | 24–36″ |
| Plymouth County | 29″ | 24–36″ |
| Suffolk County | 29″ | 24–36″ |
| Worcester County | 34″ | 30–42″ |
Common questions
What is the frost line depth in Massachusetts?
It ranges from about 20 inches in the mildest county to 38 inches in the coldest, in typical soil.
Which Massachusetts county has the deepest frost?
Franklin County, at about 38 inches in typical soil.