Frost Line Depth in Chino Hills, California
- 4 verified codes nearby
- Checked Oct 2026
No official local value
No official frost line depth is published for Chino Hills.
Nearby official codes require 12 in (4 verified codes).
Source and how we checked
We searched this place’s own code and website and found no published frost line depth.
Climate: 11 nights a year at or below 32 °F (NOAA 1991–2020, Chino Airport, 5.6 mi).
Checked Oct 2026. Report a correction
Does Chino Hills have an official frost line depth?
No adopted frost line depth found for Chino Hills in its official documents (checked Oct 2026). The nearest official values, from codes we verified, are 12 in. Use the deepest of them until the building department confirms Chino Hills’s own number.
What frost line depth does Chino Hills use for footings under Table R301.2(1)? Is it 12 in, like Chino?
How deep do footings, decks and water lines need to be in Chino Hills?
Drawn with the deepest nearby official value (12 in). Confirm Chino Hills’s own depth before you dig.
House or garage footing in Chino Hills: 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 Hills?
- J
- F
- M
- A
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- D
Chino Hills 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, 5.6 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 Hills 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 Hills use?
4 official codes near Chino Hills are verified; each links to its document.
How likely is the soil in Chino Hills to heave?
USDA rates the sampled soil around Chino Hills as 100% none for frost action (main soils: Fontana, Alo, Gaviota).
USDA NRCS soil survey, 9 sample points within 2 mi. Higher frost action means more risk of heave; see frost heave.
Chino Hills at a glance
- Frost line depth
- No official local value
- County
- San Bernardino County
- Population (2023 est.)
- 77,212
- Mean annual temperature
- 66.1 °F
- ZIP codes (2)
- 91709 · 91710