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

No official local value

No official frost line depth is published for Corona.

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, 8.8 mi).

Checked Oct 2026. Report a correction

Footings Deck Water line Fence post

12 in4 verified codes within 25 mi
11nights a year at or below 32 °F
57%of nearby soil rated “none” for frost action (USDA)

Does Corona have an official frost line depth?

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

What frost line depth does Corona 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 Corona 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 Corona?

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

House or garage footing Deck footing Water service line Fence post

House or garage footing in Corona: 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 Corona 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 Corona?

Corona 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, 8.8 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

Corona 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 Corona use?

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

Official frost line depths near Corona
Place	Verified frost line	Distance
Chino	12 in	10 mi away
Mission Viejo	12 in	18 mi away
Santa Ana	12 in	20 mi away
Glendora	12 in	25 mi away

How likely is the soil in Corona to heave?

None 57%Moderate 43%

USDA rates the sampled soil around Corona as 57% none, 43% moderate for frost action (main soils: Garretson, Arbuckle, Rough broken land).

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

Corona at a glance

Frost line depth: No official local value
County: Riverside County
Population (2023 est.): 160,238
Mean annual temperature: 66.1 °F
ZIP codes (6): 92503 · 92879 · 92880 · 92881 · 92882 · 92883