Frost Line Depth in Yuma, AZ: Frost Rarely Reaches the Ground

No official local value

Frost rarely reaches the ground in Yuma.

No verified code nearby; verified Arizona codes range 0–30 in.

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, Yuma Mcas, 10.8 mi).

Checked Oct 2026. Report a correction

Footings Deck Water line Fence post

0–30 inrange of verified Arizona codes
0nights a year at or below 32 °F
100%of nearby soil rated “none” for frost action (USDA)

Does Yuma have an official frost line depth?

No adopted frost line depth found for Yuma in its official documents (checked Oct 2026). No verified code lies near Yuma; the Arizona codes we verified range from 0 to 30 in. Ask the building department for Yuma’s own number before you dig.

What frost line depth does Yuma use for footings under Table R301.2(1)?

Call 811 at least a few working days before you dig, so buried lines are marked.
Confirm the frost line depth with the Yuma building department.
Ask whether your project needs a permit (decks, larger sheds and footings usually do).
Dig below 30 in (the deepest verified state 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 Yuma?

Drawn with the deepest Arizona official value (30 in). Confirm Yuma’s own depth before you dig.

House or garage footing Deck footing Water service line Fence post

House or garage footing in Yuma: dig at least 30 in (76 cm). Below the frost line and at least 12 in deep (IRC R403.1.4).

Minimum depths in Yuma with a 30 in frost line
Project	Depth	Rule
House or garage footing	30 in	Below the frost line and at least 12 in deep (IRC R403.1.4)
Deck footing (attached)	30 in	Below the frost line and at least 12 in deep (IRC R507.3)
Water service line	36 in	6 in below the frost line and at least 12 in deep (IRC P2603.5)
Fence post bottom	30 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 Yuma?

Yuma never averages a low below freezing. 0 nights a year reach 32 °F or colder; Dec is coldest, with an average low of 46.8 °F.

NOAA 1991–2020 climate normals, Yuma Mcas station, 10.8 mi away, elevation 213 ft.

Monthly temperatures as a table

°F	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Low	47.9	50.4	55	59.8	66.9	75	82.6	83.2	77.6	65.7	54.4	46.8
High	69.8	73.4	80.2	86.4	94.3	103.3	106.7	106.4	101.4	90.2	77.7	67.8

Yuma has fewer freezing nights than 35 of the 35 other Arizona places we track. The Arizona median is 12. Coldest: Flagstaff; mildest: Yuma.

How likely is the soil in Yuma to heave?

None 100%

USDA rates the sampled soil around Yuma as 100% none for frost action (main soils: Superstition, Rositas, Tucson).

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

Yuma at a glance

Frost line depth: No official local value
County: Yuma County
Population (2023 est.): 100,858
Mean annual temperature: 76 °F
ZIP codes (3): 85350 · 85364 · 85365