Frost Line Depth in Long Beach, California
- 4 verified codes nearby
- Checked Oct 2026
No official local value
Frost rarely reaches the ground in Long Beach.
Nearby official codes require 12 in (4 verified codes).
Footings still go at least 12 in (30 cm) below undisturbed ground (IRC R403.1.4).
Source and how we checked
We searched this place’s own code and website and found no published frost line depth.
Climate: 0 nights a year at or below 32 °F (NOAA 1991–2020, Long Beach Daugherty Fld, 2.5 mi).
Checked Oct 2026. Report a correction
Does Long Beach have an official frost line depth?
No adopted frost line depth found for Long Beach 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 Long Beach’s own number.
What frost line depth does Long Beach use for footings under Table R301.2(1)? Is it 12 in, like Paramount?
How deep do footings, decks and water lines need to be in Long Beach?
Drawn with the deepest nearby official value (12 in). Confirm Long Beach’s own depth before you dig.
House or garage footing in Long Beach: 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 Long Beach?
- J
- F
- M
- A
- M
- J
- J
- A
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- D
Long Beach never averages a low below freezing. 0 nights a year reach 32 °F or colder; Dec is coldest, with an average low of 46.6 °F.
NOAA 1991–2020 climate normals, Long Beach Daugherty Fld station, 2.5 mi away, elevation 31 ft.
Monthly temperatures as a table
| °F | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Low | 46.9 | 48.4 | 51.2 | 53.9 | 57.9 | 61.3 | 64.9 | 65.5 | 63.9 | 59.1 | 51.6 | 46.6 |
| High | 67.4 | 66.8 | 68.6 | 71.4 | 73.1 | 76.1 | 81.4 | 83.2 | 82.4 | 77.7 | 72.5 | 66.7 |
Long Beach has fewer freezing nights than 166 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 Long Beach use?
4 official codes near Long Beach are verified; each links to its document.
How likely is the soil in Long Beach to heave?
USDA rates the sampled soil around Long Beach as 98% none, 2% low for frost action (main soils: Windfetch, Metz, Thums).
USDA NRCS soil survey, 9 sample points within 2 mi. Higher frost action means more risk of heave; see frost heave.
Long Beach at a glance
- Frost line depth
- No official local value
- County
- Los Angeles County
- Population (2023 est.)
- 449,468
- Mean annual temperature
- 64.9 °F
- ZIP codes (20)
- 90712 · 90713 · 90731 · 90740 · 90744 · 90755 · 90802 · 90803 · 90804 · 90805 · 90806 · 90807 · 90808 · 90810 · 90813 · 90814 · 90815 · 90822 · 90831 · 90840