Frost Line Depth in Vermilion County, Illinois
- 2 verified codes nearby
- Checked Oct 2026
No official local value
No official frost line depth is published for Vermilion County.
Nearby official codes require 36–40 in (2 verified codes).
Source and how we checked
We searched this place’s own code and website and found no published frost line depth.
Climate: 112 nights a year at or below 32 °F (NOAA 1991–2020, Danville, 5.3 mi).
Checked Oct 2026. Report a correction
Does Vermilion County have an official frost line depth?
No adopted frost line depth found for Vermilion County in its official documents (checked Oct 2026). The nearest official values, from codes we verified, are 36 to 40 in. Use the deepest of them until the building department confirms Vermilion County’s own number.
What frost line depth does Vermilion County use for footings under Table R301.2(1)? Is it 40 in, like Bloomington?
How deep do footings, decks and water lines need to be in Vermilion County?
Drawn with the deepest nearby official value (40 in). Confirm Vermilion County’s own depth before you dig.
House or garage footing in Vermilion County: dig at least 40 in (102 cm). Below the frost line and at least 12 in deep (IRC R403.1.4).
| Project | Depth | Rule |
|---|---|---|
| House or garage footing | 40 in | Below the frost line and at least 12 in deep (IRC R403.1.4) |
| Deck footing (attached) | 40 in | Below the frost line and at least 12 in deep (IRC R507.3) |
| Water service line | 46 in | 6 in below the frost line and at least 12 in deep (IRC P2603.5) |
| Fence post bottom | 40 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 Vermilion County?
- J
- F
- M
- A
- M
- J
- J
- A
- S
- O
- N
- D
Average lows are at or below freezing from Dec to Feb. 112 nights a year reach 32 °F or colder; Jan is coldest, with an average low of 19.5 °F.
NOAA 1991–2020 climate normals, Danville station, 5.3 mi away, elevation 555 ft.
Monthly temperatures as a table
| °F | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Low | 19.5 | 22.9 | 32.1 | 42.3 | 52.3 | 61.3 | 64.8 | 63 | 55.6 | 44.3 | 33.8 | 24.9 |
| High | 35.3 | 40.4 | 52 | 65.2 | 75.3 | 83.1 | 85.4 | 83.9 | 78.9 | 66.5 | 51.9 | 39.9 |
Vermilion County has fewer freezing nights than 55 of the 71 other Illinois places we track. The Illinois median is 127. Coldest: Hoffman Estates; mildest: Madison County.
What frost line depth do towns near Vermilion County use?
2 official codes near Vermilion County are verified; each links to its document.
| Place | Verified frost line | Distance |
|---|---|---|
| Bloomington | 40 in | 68 mi away |
| Decatur | 36 in | 68 mi away |
How likely is the soil in Vermilion County to heave?
USDA rates the sampled soil around Vermilion County as 12% moderate, 88% high for frost action (main soils: Ashkum, Blount, Fincastle).
USDA NRCS soil survey, 9 sample points within 2 mi. Higher frost action means more risk of heave; see frost heave.
Vermilion County at a glance
- Frost line depth
- No official local value
- Population (2023 est.)
- 71,652
- Mean annual temperature
- 53.1 °F
- ZIP codes (27)
- 60932 · 60942 · 60960 · 60963 · 61810 · 61811 · 61812 · 61814 · 61817 · 61831 · 61832 · 61833 · 61834 · 61841 · 61844 · 61846 · 61848 · 61849 · 61850 · 61857 · 61858 · 61859 · 61862 · 61865 · 61870 · 61876 · 61883