Frost Line Depth in Beaumont, CA: Nearby Codes Require 12 in

No official local value

No official frost line depth is published for Beaumont.

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: 15 nights a year at or below 32 °F (NOAA 1991–2020, San Jacinto, 5.7 mi).

Checked Oct 2026. Report a correction

Footings Deck Water line Fence post

12 in4 verified codes within 54 mi
15nights a year at or below 32 °F
87%of nearby soil rated “moderate” for frost action (USDA)

Does Beaumont have an official frost line depth?

No adopted frost line depth found for Beaumont 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 Beaumont’s own number.

What frost line depth does Beaumont use for footings under Table R301.2(1)? Is it 12 in, like Chino?

Call 811 at least a few working days before you dig, so buried lines are marked.
Confirm the frost line depth with the Beaumont building department.
Ask whether your project needs a permit (decks, larger sheds and footings usually do).
Dig below 12 in (the deepest nearby value) unless the building department tells you otherwise.
Book the footing inspection before you pour concrete.

How deep do footings, decks and water lines need to be in Beaumont?

Drawn with the deepest nearby official value (12 in). Confirm Beaumont’s own depth before you dig.

House or garage footing Deck footing Water service line Fence post

House or garage footing in Beaumont: dig at least 12 in (30 cm). Below the frost line and at least 12 in deep (IRC R403.1.4).

Using the nearby official value of 12 in until Beaumont confirms its own
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 Beaumont?

Beaumont never averages a low below freezing. 15 nights a year reach 32 °F or colder; Dec is coldest, with an average low of 39 °F.

NOAA 1991–2020 climate normals, San Jacinto station, 5.7 mi away, elevation 1,525 ft.

Monthly temperatures as a table

°F	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Low	40.1	41.7	45	47.9	53.3	57.6	63.6	64.3	60.7	52.7	44.4	39
High	65.8	65.8	70.2	74.4	80.4	88.7	95.1	96.5	91.8	82.3	72.7	65

Beaumont has more freezing nights than 156 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 Beaumont use?

4 official codes near Beaumont are verified; each links to its document.

Official frost line depths near Beaumont
Place	Verified frost line	Distance
Chino	12 in	41 mi away
Mission Viejo	12 in	44 mi away
Glendora	12 in	54 mi away
Santa Ana	12 in	54 mi away

How likely is the soil in Beaumont to heave?

None 13%Moderate 87%

USDA rates the sampled soil around Beaumont as 13% none, 87% moderate for frost action (main soils: Badland, Cieneba, Friant).

USDA NRCS soil survey, 9 sample points within 2 mi. Higher frost action means more risk of heave; see frost heave.

Beaumont at a glance

Frost line depth: No official local value
County: Riverside County
Population (2023 est.): 58,463
Mean annual temperature: 65 °F
ZIP codes (3): 92220 · 92223 · 92583