Will Pipes Freeze in Liberty County, MT? 114 nights a Year
Freeze nights in Liberty County
In a normal year Liberty County, MT gets 114 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 97% of US counties.
Risk level: Severe. The risk season runs October to April, worst in January.
It depends where the pipe is
| Pipe | Freezes near | Nights a year |
|---|---|---|
| Outdoor spigot, open crawlspace | 32°F | 197 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 114 nights |
| Insulated pipe in unheated space | 10°F | 64 nights |
| Inside the heated house | 0°F | 34 nights |
Foam-sleeving a bare pipe in unheated space takes it from 114 nights of risk to 64 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 09/17, last around 05/24. For 20°F: 10/11 to 04/20.
How cold Liberty County nights get
Average winter (Dec-Feb) low: 6°F; the coldest month, January, averages 4°F overnight. 9 months normally bring at least one night below 32°F (Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec). Nights below 10°F, cold enough to freeze insulated pipe in an unheated space, come in January, February, March, April, October, November, December: 64 nights a year, and 34 nights below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 4°F | 7°F | 17°F | 28°F | 38°F | 46°F | 52°F | 50°F | 41°F | 28°F | 16°F | 7°F |
Liberty County next to its neighbours
Toole County, MT, 52 km west, gets 109 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Liberty County, MT | - | 197 nights | 114 nights | 4°F |
| Toole County, MT | 52 km west | 194 nights | 109 nights | 7°F |
| Hill County, MT | 69 km east | 186 nights | 101 nights | 6°F |
| Chouteau County, MT | 87 km southeast | 182 nights | 97 nights | 8°F |
| Pondera County, MT | 95 km west | 173 nights | 82 nights | 13°F |
| Teton County, MT | 124 km southwest | 177 nights | 83 nights | 13°F |
| Cascade County, MT | 140 km south | 158 nights | 69 nights | 16°F |
Liberty County within MT
Liberty County ranks 8 of 56 MT counties for nights below 20°F. The most is Sheridan County, MT at 129 nights, with a 2°F average winter low. The fewest is Lake County, MT: 40 nights, winter lows near 22°F. At 3,284 ft, Liberty County sits 638 ft below the state's median county elevation of 3,922 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 Chester, MT, 8 km away (close match). A normal year, not tonight's forecast: check the forecast low for the night itself. How a county figure is built from stations: how the numbers are made.