Frost Line Depth in Port Arthur, TX: Texas Codes Range 0

No official local value

No official frost line depth is published for Port Arthur.

No verified code nearby; verified Texas codes range 0–12 in.

Source and how we checked

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

Climate: 8 nights a year at or below 32 °F (NOAA 1991–2020, Port Arthur Se Tx Airport, 8.3 mi).

Checked Oct 2026. Report a correction

Footings Deck Water line Fence post

0–12 inrange of verified Texas codes
8nights a year at or below 32 °F
100%of nearby soil rated “none” for frost action (USDA)

Does Port Arthur have an official frost line depth?

No adopted frost line depth found for Port Arthur in its official documents (checked Oct 2026). No verified code lies near Port Arthur; the Texas codes we verified range from 0 to 12 in. Ask the building department for Port Arthur’s own number before you dig.

What frost line depth does Port Arthur 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 Port Arthur building department.
Ask whether your project needs a permit (decks, larger sheds and footings usually do).
Dig below 12 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 Port Arthur?

Drawn with the deepest Texas official value (12 in). Confirm Port Arthur’s own depth before you dig.

House or garage footing Deck footing Water service line Fence post

House or garage footing in Port Arthur: 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 Port Arthur 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 Port Arthur?

Port Arthur never averages a low below freezing. 8 nights a year reach 32 °F or colder; Jan is coldest, with an average low of 43.8 °F.

NOAA 1991–2020 climate normals, Port Arthur Se Tx Airport station, 8.3 mi away, elevation 16 ft.

Monthly temperatures as a table

°F	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Low	43.8	47.8	53.4	59.6	67.3	73.1	74.6	74.4	70.6	61.1	51.5	45.8
High	63.5	67.3	73.2	79	85.7	90.9	92.6	93.1	89.5	82.1	72.3	65.5

Port Arthur has fewer freezing nights than 139 of the 168 other Texas places we track. The Texas median is 32. Coldest: Amarillo; mildest: Brownsville.

How likely is the soil in Port Arthur to heave?

None 100%

USDA rates the sampled soil around Port Arthur as 100% none for frost action (main soils: Veston, Neel, Urban land).

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

Port Arthur at a glance

Frost line depth: No official local value
County: Jefferson County
Population (2023 est.): 55,547
Mean annual temperature: 69.9 °F
ZIP codes (7): 77619 · 77627 · 77630 · 77640 · 77642 · 77655 · 77705