Will Pipes Freeze in Treasure County, MT? 85 nights a Year
Freeze nights in Treasure County
In a normal year Treasure County, MT gets 85 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 85% 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 | 173 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 85 nights |
| Insulated pipe in unheated space | 10°F | 44 nights |
| Inside the heated house | 0°F | 21 nights |
Foam-sleeving a bare pipe in unheated space takes it from 85 nights of risk to 44 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 09/29, last around 05/10. For 20°F: 10/30 to 04/05.
How cold Treasure County nights get
Average winter (Dec-Feb) low: 12°F; the coldest month, January, averages 10°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, October, November, December: 44 nights a year, and 21 nights below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 10°F | 14°F | 23°F | 32°F | 41°F | 50°F | 56°F | 54°F | 44°F | 32°F | 21°F | 13°F |
Treasure County next to its neighbours
Yellowstone County, MT, 84 km west, gets 89 nights below 20°F to Treasure County's 85 nights. Rosebud County, MT, 47 km east, gets 84 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Treasure County, MT | - | 173 nights | 85 nights | 10°F |
| Rosebud County, MT | 47 km east | 172 nights | 84 nights | 11°F |
| Yellowstone County, MT | 84 km west | 181 nights | 89 nights | 12°F |
| Big Horn County, MT | 93 km south | 175 nights | 88 nights | 13°F |
| Musselshell County, MT | 95 km west | 169 nights | 76 nights | 13°F |
| Garfield County, MT | 118 km north | 192 nights | 102 nights | 5°F |
| Petroleum County, MT | 125 km northwest | 176 nights | 89 nights | 11°F |
Treasure County within MT
Treasure County ranks 40 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 3,172 ft, Treasure County sits 751 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.
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 Hysham, MT, 8 km away (fair 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.