Will Pipes Freeze in Vermilion County, IL? 43 nights a Year
Freeze nights in Vermilion County
In a normal year Vermilion County, IL gets 43 nights at or below 20°F, the point where bare pipes in a garage, attic or outside wall start to freeze. That is more than 58% of US counties.
Risk level: Severe. The risk season runs November to March, worst in January.
It depends where the pipe is
| Pipe | Freezes near | Nights a year |
|---|---|---|
| Outdoor spigot, open crawlspace | 32°F | 115 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 43 nights |
| Insulated pipe in unheated space | 10°F | 17 nights |
| Inside the heated house | 0°F | 6 nights |
Foam-sleeving a bare pipe in unheated space takes it from 43 nights of risk to 17 nights. A 12 ft heat-tape kit runs $17 to $37; an average burst-pipe repair is about $500.
Month by month
Nights at or below 20°F in a normal year.
First 32°F night is usually around 10/20, last around 04/21. For 20°F: 11/24 to 03/17.
How cold Vermilion County nights get
Average winter (Dec-Feb) low: 22°F; the coldest month, January, averages 19°F overnight. 7 months normally bring at least one night below 32°F (Jan, Feb, Mar, Apr, Oct, Nov, Dec). Nights below 10°F, cold enough to freeze insulated pipe in an unheated space, come in January, February, March, December: 17 nights a year, and 6 nights below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 19°F | 22°F | 31°F | 42°F | 52°F | 61°F | 65°F | 63°F | 55°F | 44°F | 33°F | 24°F |
Vermilion County next to its neighbours
Warren County, IN, 35 km northeast, gets 54 nights below 20°F to Vermilion County's 43 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Vermilion County, IL | - | 115 nights | 43 nights | 19°F |
| Warren County, IN | 35 km northeast | 130 nights | 54 nights | 16°F |
| Champaign County, IL | 40 km west | 121 nights | 45 nights | 18°F |
| Fountain County, IN | 42 km east | 126 nights | 51 nights | 17°F |
| Vermillion County, IN | 43 km southeast | 117 nights | 44 nights | 17°F |
| Edgar County, IL | 56 km south | 117 nights | 44 nights | 17°F |
| Benton County, IN | 58 km northeast | 136 nights | 57 nights | 16°F |
Vermilion County within IL
Vermilion County ranks 57 of 102 IL counties for nights below 20°F. The most is Jo Daviess County, IL at 76 nights, with a 14°F average winter low. The fewest is Alexander County, IL: 21 nights, winter lows near 29°F. At 667 ft, Vermilion County sits close to the state's median county elevation of 632 ft.
What to do here
- Treat it as a building fix, not a night-of routine: insulate, heat tape, seal crawlspace vents.
- An automatic leak shutoff pays for itself if one burst is avoided.
- Know where the main shutoff is before the first hard freeze.
Interior pipes have a threshold too: the four freeze points.
Where this comes from
NOAA 1991-2020 climate normals, blended from 3 nearby stations and adjusted for elevation; closest is Danville, IL, 9 km away (close match). A normal year, not tonight's forecast: check the forecast low for the night itself. Why elevation is part of the blend: how county numbers are made.