Will Pipes Freeze in Wheatland County, MT? 90 nights a Year
Freeze nights in Wheatland County
In a normal year Wheatland County, MT gets 90 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 88% of US counties.
Risk level: Severe. The risk season runs October to May, worst in December.
It depends where the pipe is
| Pipe | Freezes near | Nights a year |
|---|---|---|
| Outdoor spigot, open crawlspace | 32°F | 191 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 90 nights |
| Insulated pipe in unheated space | 10°F | 43 nights |
| Inside the heated house | 0°F | 21 nights |
Foam-sleeving a bare pipe in unheated space takes it from 90 nights of risk to 43 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 09/16, last around 05/23. For 20°F: 10/16 to 04/20.
How cold Wheatland County nights get
Average winter (Dec-Feb) low: 14°F; the coldest month, January, averages 13°F overnight. 10 months normally bring at least one night below 32°F (Jan, Feb, Mar, Apr, May, Jun, 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: 43 nights a year, and 21 nights below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 13°F | 14°F | 20°F | 28°F | 37°F | 45°F | 50°F | 49°F | 40°F | 30°F | 21°F | 14°F |
Wheatland County next to its neighbours
Meagher County, MT, 82 km west, gets 95 nights below 20°F to Wheatland County's 90 nights. Golden Valley County, MT, 54 km east, gets 87 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Wheatland County, MT | - | 191 nights | 90 nights | 13°F |
| Golden Valley County, MT | 54 km east | 181 nights | 87 nights | 14°F |
| Judith Basin County, MT | 69 km northwest | 196 nights | 90 nights | 15°F |
| Sweet Grass County, MT | 77 km south | 153 nights | 63 nights | 20°F |
| Meagher County, MT | 82 km west | 204 nights | 95 nights | 13°F |
| Fergus County, MT | 94 km northeast | 184 nights | 88 nights | 14°F |
| Stillwater County, MT | 100 km south | 182 nights | 87 nights | 11°F |
Wheatland County within MT
Wheatland County ranks 32 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 4,487 ft, Wheatland County sits 564 ft above 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.
At this many nights, foam alone is not the answer: insulate or heat tape?.
Where this comes from
NOAA 1991-2020 climate normals, blended from 3 nearby stations and adjusted for elevation; closest is Harlowton, MT, 7 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.