Frost Line Depth in Calaveras County, California
- 3 verified codes nearby
- Checked Oct 2026
No official local value
No official frost line depth is published for Calaveras County.
Nearby official codes require 12–30 in (3 verified codes).
Source and how we checked
We searched this place’s own code and website and found no published frost line depth.
Climate: 13 nights a year at or below 32 °F (NOAA 1991–2020, New Melones Dam Hq, 13.4 mi).
Checked Oct 2026. Report a correction
Does Calaveras County have an official frost line depth?
No adopted frost line depth found for Calaveras County in its official documents (checked Oct 2026). The nearest official values, from codes we verified, are 12 to 30 in. Use the deepest of them until the building department confirms Calaveras County’s own number.
What frost line depth does Calaveras County use for footings under Table R301.2(1)? Is it 12 in, like Turlock?
How deep do footings, decks and water lines need to be in Calaveras County?
Drawn with the deepest nearby official value (30 in). Confirm Calaveras County’s own depth before you dig.
House or garage footing in Calaveras County: dig at least 30 in (76 cm). Below the frost line and at least 12 in deep (IRC R403.1.4).
| Project | Depth | Rule |
|---|---|---|
| House or garage footing | 30 in | Below the frost line and at least 12 in deep (IRC R403.1.4) |
| Deck footing (attached) | 30 in | Below the frost line and at least 12 in deep (IRC R507.3) |
| Water service line | 36 in | 6 in below the frost line and at least 12 in deep (IRC P2603.5) |
| Fence post bottom | 30 in | No code rule; common practice is below the frost line |
Work out posts, concrete and footing sizes with the fence post depth calculator or the deck footing calculator.
How cold does it get in Calaveras County?
- J
- F
- M
- A
- M
- J
- J
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- S
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- N
- D
Calaveras County never averages a low below freezing. 13 nights a year reach 32 °F or colder; Dec is coldest, with an average low of 37.8 °F.
NOAA 1991–2020 climate normals, New Melones Dam Hq station, 13.4 mi away, elevation 960 ft.
Monthly temperatures as a table
| °F | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Low | 38.2 | 39.7 | 43.5 | 45.9 | 52.4 | 59.2 | 65.4 | 64.5 | 60.2 | 52.4 | 44.1 | 37.8 |
| High | 57.3 | 60.6 | 64.8 | 70 | 79.4 | 89.3 | 97.1 | 96.2 | 90.7 | 79.7 | 66 | 57.4 |
Calaveras County has more freezing nights than 149 of the 208 other California places we track. The California median is 3. Coldest: El Dorado County; mildest: San Diego.
What frost line depth do towns near Calaveras County use?
3 official codes near Calaveras County are verified; each links to its document.
| Place | Verified frost line | Distance |
|---|---|---|
| Turlock | 12 in | 50 mi away |
| Placer County | 18 in | 61 mi away |
| Brentwood | 30 in | 66 mi away |
How likely is the soil in Calaveras County to heave?
USDA rates the sampled soil around Calaveras County as 100% none for frost action (main soils: Nedsgulch, Millvilla, Wallyhill).
USDA NRCS soil survey, 9 sample points within 2 mi. Higher frost action means more risk of heave; see frost heave.
Calaveras County at a glance
- Frost line depth
- No official local value
- Population (2023 est.)
- 46,565
- Mean annual temperature
- 63 °F
- ZIP codes (21)
- 95221 · 95222 · 95223 · 95224 · 95225 · 95226 · 95228 · 95230 · 95232 · 95233 · 95236 · 95245 · 95246 · 95247 · 95248 · 95249 · 95251 · 95252 · 95254 · 95255 · 95257