Will Pipes Freeze in Bowman County, ND? 106 nights a Year
Freeze nights in Bowman County
In a normal year Bowman County, ND gets 106 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 94% 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 | 189 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 106 nights |
| Insulated pipe in unheated space | 10°F | 58 nights |
| Inside the heated house | 0°F | 30 nights |
Foam-sleeving a bare pipe in unheated space takes it from 106 nights of risk to 58 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 09/25, last around 05/16. For 20°F: 10/21 to 04/15.
How cold Bowman County nights get
Average winter (Dec-Feb) low: 9°F; the coldest month, January, averages 7°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: 58 nights a year, and 30 nights below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 7°F | 9°F | 19°F | 29°F | 40°F | 50°F | 56°F | 54°F | 44°F | 31°F | 19°F | 10°F |
Bowman County next to its neighbours
Adams County, ND, 75 km east, gets 118 nights below 20°F to Bowman County's 106 nights. Slope County, ND, 37 km north, gets 100 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Bowman County, ND | - | 189 nights | 106 nights | 7°F |
| Slope County, ND | 37 km north | 182 nights | 100 nights | 7°F |
| Harding County, SD | 57 km south | 183 nights | 100 nights | 8°F |
| Fallon County, MT | 73 km west | 185 nights | 103 nights | 7°F |
| Adams County, ND | 75 km east | 199 nights | 118 nights | 5°F |
| Hettinger County, ND | 89 km northeast | 194 nights | 115 nights | 4°F |
| Golden Valley County, ND | 96 km north | 185 nights | 102 nights | 6°F |
Bowman County within ND
Bowman County ranks 50 of 53 ND counties for nights below 20°F. The most is Rolette County, ND at 137 nights, with a -3°F average winter low. The fewest is Slope County, ND: 100 nights, winter lows near 10°F. At 2,997 ft, Bowman County sits 1,264 ft above the state's median county elevation of 1,733 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 Bowman, ND, 14 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.