Frost line depth in Delaware
Estimated frost depth in typical soil runs from 19″ to 23″ across Delaware's 3 counties. Pick your county or enter a ZIP code for a local estimate.
Deepest frost
- New Castle County 23″
- Kent County 19″
- Sussex County 19″
Mildest
- Sussex County 19″
- Kent County 19″
- New Castle County 23″
Frost depth by county
| County | Est. frost (typical soil) | Typical code range |
|---|---|---|
| Kent County | 19″ | 18–24″ |
| New Castle County | 23″ | 18–30″ |
| Sussex County | 19″ | 18–24″ |
Common questions
What is the frost line depth in Delaware?
It ranges from about 19 inches in the mildest county to 23 inches in the coldest, in typical soil.
Which Delaware county has the deepest frost?
New Castle County, at about 23 inches in typical soil.