Will Pipes Freeze in Golden Valley County, MT? 87 nights a Year
Freeze nights in Golden Valley County
In a normal year Golden Valley County, MT gets 87 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 86% of US counties.
Risk level: Severe. The risk season runs October to April, worst in December.
It depends where the pipe is
| Pipe | Freezes near | Nights a year |
|---|---|---|
| Outdoor spigot, open crawlspace | 32°F | 181 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 87 nights |
| Insulated pipe in unheated space | 10°F | 40 nights |
| Inside the heated house | 0°F | 18 nights |
Foam-sleeving a bare pipe in unheated space takes it from 87 nights of risk to 40 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 09/23, last around 05/17. For 20°F: 10/24 to 04/12.
How cold Golden Valley County nights get
Average winter (Dec-Feb) low: 14°F; the coldest month, December, averages 14°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: 40 nights a year, and 18 nights below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 14°F | 15°F | 23°F | 30°F | 39°F | 47°F | 53°F | 51°F | 42°F | 31°F | 22°F | 14°F |
Golden Valley County next to its neighbours
Wheatland County, MT, 54 km west, gets 90 nights below 20°F to Golden Valley County's 87 nights. Musselshell County, MT, 58 km east, gets 76 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Golden Valley County, MT | - | 181 nights | 87 nights | 14°F |
| Wheatland County, MT | 54 km west | 191 nights | 90 nights | 13°F |
| Musselshell County, MT | 58 km east | 169 nights | 76 nights | 13°F |
| Stillwater County, MT | 82 km south | 182 nights | 87 nights | 11°F |
| Yellowstone County, MT | 85 km southeast | 181 nights | 89 nights | 12°F |
| Sweet Grass County, MT | 87 km southwest | 153 nights | 63 nights | 20°F |
| Fergus County, MT | 94 km north | 184 nights | 88 nights | 14°F |
Golden Valley County within MT
Golden Valley County ranks 38 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 3,984 ft, Golden Valley County sits 62 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.
The dates to be done by: when freeze season starts and ends.
Where this comes from
NOAA 1991-2020 climate normals, blended from 3 nearby stations and adjusted for elevation; closest is Ryegate, MT, 11 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.