Frost Line Depth in Chino, California
- Chino’s adopted code
- Checked Oct 2026
- Sources
Verified
12in
30 cm · 1 ft
12–24 in
Set in the building code Chino has adopted.
Source and how we checked
Document: library.municode.com
Climate: 11 nights a year at or below 32 °F (NOAA 1991–2020, Chino Airport, 1.3 mi).
Checked Oct 2026. Report a correction
How deep is the frost line in Chino?
Chino's building authority lists a frost line depth of 12–24 in (30–61 cm). Footings, piers and other permanent supports must reach at least this depth (IRC R403.1.4.1).
Who sets the frost line depth in Chino?
California leaves the frost line depth to each city or county, and Chino fills it in when it adopts the residential code. The value above comes from Chino’s own document on library.municode.com. See how California sets frost line depth.
How deep do footings, decks and water lines need to be in Chino?
House or garage footing in Chino: dig at least 12 in (30 cm). Below the frost line and at least 12 in deep (IRC R403.1.4).
| Project | Depth | Rule |
|---|---|---|
| House or garage footing | 12 in | Below the frost line and at least 12 in deep (IRC R403.1.4) |
| Deck footing (attached) | 12 in | Below the frost line and at least 12 in deep (IRC R507.3) |
| Water service line | 18 in | 6 in below the frost line and at least 12 in deep (IRC P2603.5) |
| Fence post bottom | 12 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 Chino?
- J
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- M
- A
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- J
- J
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- D
Chino never averages a low below freezing. 11 nights a year reach 32 °F or colder; Dec is coldest, with an average low of 40.4 °F.
NOAA 1991–2020 climate normals, Chino Airport station, 1.3 mi away, elevation 650 ft.
Monthly temperatures as a table
| °F | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Low | 41.7 | 42.9 | 45.8 | 48.7 | 54.3 | 58.5 | 62.9 | 63.2 | 60.4 | 53.3 | 45.1 | 40.4 |
| High | 69.5 | 69.8 | 72.5 | 77 | 81.1 | 87.6 | 93.7 | 96.3 | 92.7 | 84.5 | 76.3 | 68.7 |
Chino has more freezing nights than 141 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 Chino use?
4 official codes near Chino are verified; each links to its document.
How likely is the soil in Chino to heave?
USDA rates the sampled soil around Chino as 100% none for frost action (main soils: Chino, Chualar, Tujunga).
USDA NRCS soil survey, 9 sample points within 2 mi. Higher frost action means more risk of heave; see frost heave.
How do you confirm the frost line before you dig in Chino?
Chino at a glance
- Frost line depth
- 12–24 in
- County
- San Bernardino County
- Population (2023 est.)
- 93,114
- Mean annual temperature
- 66.1 °F
- ZIP codes (5)
- 91708 · 91709 · 91710 · 91762 · 92880