Will Pipes Freeze in Mercer County, ND? 113 nights a Year
Freeze nights in Mercer County
In a normal year Mercer County, ND gets 113 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 96% 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 | 191 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 113 nights |
| Insulated pipe in unheated space | 10°F | 64 nights |
| Inside the heated house | 0°F | 35 nights |
Foam-sleeving a bare pipe in unheated space takes it from 113 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 09/20, last around 05/21. For 20°F: 10/20 to 04/19.
How cold Mercer County nights get
Average winter (Dec-Feb) low: 6°F; the coldest month, January, averages 3°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: 64 nights a year, and 35 nights below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 3°F | 7°F | 18°F | 29°F | 41°F | 51°F | 56°F | 54°F | 44°F | 32°F | 18°F | 8°F |
Mercer County next to its neighbours
Oliver County, ND, 43 km southeast, gets 117 nights below 20°F to Mercer County's 113 nights. Stark County, ND, 83 km southwest, gets 112 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Mercer County, ND | - | 191 nights | 113 nights | 3°F |
| Oliver County, ND | 43 km southeast | 191 nights | 117 nights | 4°F |
| McLean County, ND | 49 km northeast | 192 nights | 119 nights | 2°F |
| Dunn County, ND | 59 km west | 194 nights | 116 nights | 0°F |
| Morton County, ND | 77 km southeast | 191 nights | 116 nights | 3°F |
| Stark County, ND | 83 km southwest | 192 nights | 112 nights | 5°F |
| Ward County, ND | 103 km north | 184 nights | 113 nights | 2°F |
Mercer County within ND
Mercer County ranks 36 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 1,869 ft, Mercer County sits 135 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 Beulah (1 mi W), ND, 6 km away (close match). A normal year, not tonight's forecast: check the forecast low for the night itself. What a "fair" or "distant" station match means is in the method guide.