Frost line depth in Arizona
Estimated frost depth in typical soil runs from 0″ to 25″ across Arizona's 15 counties. Pick your county or enter a ZIP code for a local estimate.
Deepest frost
- Coconino County 25″
- Apache County 24″
- Navajo County 23″
- Yavapai County 12″
- Greenlee County 9″
Mildest
Frost depth by county
| County | Est. frost (typical soil) | Typical code range |
|---|---|---|
| Apache County | 24″ | 24–30″ |
| Cochise County | 6″ | 12–18″ |
| Coconino County | 25″ | 24–36″ |
| Gila County | 7″ | 12–18″ |
| Graham County | 7″ | 12–18″ |
| Greenlee County | 9″ | 12–18″ |
| La Paz County | 1″ | 12″ minimum |
| Maricopa County | 0″ | 12″ minimum |
| Mohave County | 6″ | 12–18″ |
| Navajo County | 23″ | 18–30″ |
| Pima County | 2″ | 12″ minimum |
| Pinal County | 3″ | 12″ minimum |
| Santa Cruz County | 5″ | 12–18″ |
| Yavapai County | 12″ | 12–18″ |
| Yuma County | 0″ | 12″ minimum |
Common questions
What is the frost line depth in Arizona?
It ranges from about 0 inches in the mildest county to 25 inches in the coldest, in typical soil.
Which Arizona county has the deepest frost?
Coconino County, at about 25 inches in typical soil.