Frost Line Depth in Collierville, Tennessee
- 3 verified codes nearby
- Checked Oct 2026
No official local value
No official frost line depth is published for Collierville.
Nearby official codes require 5–13 in (3 verified codes).
Source and how we checked
We searched this place’s own code and website and found no published frost line depth.
Climate: 74 nights a year at or below 32 °F (NOAA 1991–2020, Collierville, 2.7 mi).
Checked Oct 2026. Report a correction
Does Collierville have an official frost line depth?
No adopted frost line depth found for Collierville in its official documents (checked Oct 2026). The nearest official values, from codes we verified, are 5 to 13 in. Use the deepest of them until the building department confirms Collierville’s own number.
What frost line depth does Collierville use for footings under Table R301.2(1)? Is it 5 in, like Shelby County?
How deep do footings, decks and water lines need to be in Collierville?
Drawn with the deepest nearby official value (13 in). Confirm Collierville’s own depth before you dig.
House or garage footing in Collierville: dig at least 13 in (33 cm). Below the frost line and at least 12 in deep (IRC R403.1.4).
| Project | Depth | Rule |
|---|---|---|
| House or garage footing | 13 in | Below the frost line and at least 12 in deep (IRC R403.1.4) |
| Deck footing (attached) | 13 in | Below the frost line and at least 12 in deep (IRC R507.3) |
| Water service line | 19 in | 6 in below the frost line and at least 12 in deep (IRC P2603.5) |
| Fence post bottom | 13 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 Collierville?
- J
- F
- M
- A
- M
- J
- J
- A
- S
- O
- N
- D
Average lows are at or below freezing from Jan. 74 nights a year reach 32 °F or colder; Jan is coldest, with an average low of 29.1 °F.
NOAA 1991–2020 climate normals, Collierville station, 2.7 mi away, elevation 300 ft.
Monthly temperatures as a table
| °F | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Low | 29.1 | 32.4 | 40.4 | 48.7 | 58.6 | 66.7 | 70.3 | 68.4 | 60.8 | 48.5 | 38.7 | 32.8 |
| High | 50 | 54.7 | 63.8 | 73.4 | 81.8 | 88.2 | 91.4 | 90.6 | 84.9 | 75.2 | 63.2 | 53.5 |
Collierville has fewer freezing nights than 45 of the 59 other Tennessee places we track. The Tennessee median is 84. Coldest: Greene County; mildest: Memphis.
What frost line depth do towns near Collierville use?
3 official codes near Collierville are verified; each links to its document.
| Place | Verified frost line | Distance |
|---|---|---|
| Shelby County | 5 in | 15 mi away |
| Memphis | 5 in | 16 mi away |
| Madison County | 13 in | 62 mi away |
How likely is the soil in Collierville to heave?
USDA rates the sampled soil around Collierville as 100% none for frost action (main soils: Grenada, Falaya, Adler).
USDA NRCS soil survey, 9 sample points within 2 mi. Higher frost action means more risk of heave; see frost heave.
Collierville at a glance
- Frost line depth
- No official local value
- County
- Shelby County
- Population (2023 est.)
- 51,317
- Mean annual temperature
- 61.1 °F
- ZIP codes (3)
- 38017 · 38125 · 38139