Frost Line Depth in Lea County, NM: New Mexico Codes Range 6

No official local value

No official frost line depth is published for Lea County.

No verified code nearby; verified New Mexico codes range 6–16 in.

Source and how we checked

We searched this place’s own code and website and found no published frost line depth.

Climate: 64 nights a year at or below 32 °F (NOAA 1991–2020, Hobbs 13W, 6.7 mi).

Checked Oct 2026. Report a correction

Footings Deck Water line Fence post

6–16 inrange of verified New Mexico codes
64nights a year at or below 32 °F
100%of nearby soil rated “none” for frost action (USDA)

Does Lea County have an official frost line depth?

No adopted frost line depth found for Lea County in its official documents (checked Oct 2026). No verified code lies near Lea County; the New Mexico codes we verified range from 6 to 16 in. Ask the building department for Lea County’s own number before you dig.

What frost line depth does Lea County 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 Lea County building department.
Ask whether your project needs a permit (decks, larger sheds and footings usually do).
Dig below 16 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 Lea County?

Drawn with the deepest New Mexico official value (16 in). Confirm Lea County’s own depth before you dig.

House or garage footing Deck footing Water service line Fence post

House or garage footing in Lea County: dig at least 16 in (41 cm). Below the frost line and at least 12 in deep (IRC R403.1.4).

Using the nearby official value of 16 in until Lea County confirms its own
Project	Depth	Rule
House or garage footing	16 in	Below the frost line and at least 12 in deep (IRC R403.1.4)
Deck footing (attached)	16 in	Below the frost line and at least 12 in deep (IRC R507.3)
Water service line	22 in	6 in below the frost line and at least 12 in deep (IRC P2603.5)
Fence post bottom	16 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 Lea County?

Average lows are at or below freezing from Dec to Jan. 64 nights a year reach 32 °F or colder; Jan is coldest, with an average low of 29.8 °F.

NOAA 1991–2020 climate normals, Hobbs 13w station, 6.7 mi away, elevation 3,836 ft.

Monthly temperatures as a table

°F	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Low	29.8	33.6	39.7	46.2	56.1	64.7	67.6	66.8	60.6	50.2	38.7	30.7
High	57.5	63.3	71	79.3	86.1	94.4	92.4	93	86.2	78.8	66.4	58.2

Lea County has fewer freezing nights than 16 of the 16 other New Mexico places we track. The New Mexico median is 124. Coldest: McKinley County; mildest: Lea County.

How likely is the soil in Lea County to heave?

None 100%

USDA rates the sampled soil around Lea County as 100% none for frost action (main soils: Kimbrough, Lea, Douro).

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

Lea County at a glance

Frost line depth: No official local value
Population (2023 est.): 72,101
Mean annual temperature: 63 °F
ZIP codes (11): 88114 · 88231 · 88240 · 88242 · 88244 · 88252 · 88260 · 88262 · 88264 · 88265 · 88267