Frost Line Depth in Oklahoma County, Oklahoma
- Oklahoma range from verified codes
- Checked Oct 2026
No official local value
No official frost line depth is published for Oklahoma County.
No verified code nearby; verified Oklahoma codes range 16–18 in.
Source and how we checked
We searched this place’s own code and website and found no published frost line depth.
Climate: 68 nights a year at or below 32 °F (NOAA 1991–2020, Spencer 2Ene Mesonet, 3.9 mi).
Checked Oct 2026. Report a correction
Does Oklahoma County have an official frost line depth?
No adopted frost line depth found for Oklahoma County in its official documents (checked Oct 2026). No verified code lies near Oklahoma County; the Oklahoma codes we verified range from 16 to 18 in. Ask the building department for Oklahoma County’s own number before you dig.
What frost line depth does Oklahoma County use for footings under Table R301.2(1)?
How deep do footings, decks and water lines need to be in Oklahoma County?
Drawn with the deepest Oklahoma official value (18 in). Confirm Oklahoma County’s own depth before you dig.
House or garage footing in Oklahoma County: dig at least 18 in (46 cm). Below the frost line and at least 12 in deep (IRC R403.1.4).
| Project | Depth | Rule |
|---|---|---|
| House or garage footing | 18 in | Below the frost line and at least 12 in deep (IRC R403.1.4) |
| Deck footing (attached) | 18 in | Below the frost line and at least 12 in deep (IRC R507.3) |
| Water service line | 24 in | 6 in below the frost line and at least 12 in deep (IRC P2603.5) |
| Fence post bottom | 18 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 Oklahoma County?
- J
- F
- M
- A
- M
- J
- J
- A
- S
- O
- N
- D
Average lows are at or below freezing from Dec to Jan. 68 nights a year reach 32 °F or colder; Jan is coldest, with an average low of 29.3 °F.
NOAA 1991–2020 climate normals, Spencer 2ene Mesonet station, 3.9 mi away, elevation 1,223 ft.
Monthly temperatures as a table
| °F | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Low | 29.3 | 32.1 | 41.4 | 48.8 | 58.8 | 67.5 | 71.9 | 69.7 | 62.5 | 51.6 | 40 | 31.3 |
| High | 49.7 | 54 | 63.1 | 71.4 | 78.6 | 87 | 92.2 | 92.1 | 83.9 | 73 | 60.8 | 50.9 |
Oklahoma County has fewer freezing nights than 19 of the 23 other Oklahoma places we track. The Oklahoma median is 72. Coldest: Washington County; mildest: Pittsburg County.
How likely is the soil in Oklahoma County to heave?
USDA rates the sampled soil around Oklahoma County as 100% none for frost action (main soils: Harrah, Stephenville, Watonga).
USDA NRCS soil survey, 9 sample points within 2 mi. Higher frost action means more risk of heave; see frost heave.
Oklahoma County at a glance
- Frost line depth
- No official local value
- Population (2023 est.)
- 808,866
- Mean annual temperature
- 60.9 °F
- ZIP codes (55)
- 73003 · 73007 · 73008 · 73012 · 73013 · 73020 · 73025 · 73034 · 73045 · 73049 · 73054 · 73066 · 73078 · 73084 · 73097 · 73102 · 73103 · 73104 · 73105 · 73106 · 73107 · 73108 · 73109 · 73110 · 73111 · 73112 · 73114 · 73115 · 73116 · 73117 · 73118 · 73119 · 73120 · 73121 · 73122 · 73127 · 73128 · 73129 · 73130 · 73131 · 73132 · 73134 · 73135 · 73139 · 73141 · 73142 · 73145 · 73149 · 73150 · 73151 · 73159 · 73162 · 73169 · 73179 · 74857