Will Pipes Freeze in Nobles County, MN? 97 nights a Year
Freeze nights in Nobles County
In a normal year Nobles County, MN gets 97 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 91% 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 | 168 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 97 nights |
| Insulated pipe in unheated space | 10°F | 57 nights |
| Inside the heated house | 0°F | 30 nights |
Foam-sleeving a bare pipe in unheated space takes it from 97 nights of risk to 57 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 10/04, last around 05/03. For 20°F: 11/02 to 04/06.
How cold Nobles County nights get
Average winter (Dec-Feb) low: 9°F; the coldest month, January, averages 5°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, November, December: 57 nights a year, and 30 nights below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 5°F | 9°F | 21°F | 33°F | 46°F | 57°F | 61°F | 58°F | 49°F | 36°F | 23°F | 11°F |
Nobles County next to its neighbours
Osceola County, IA, 35 km south, gets 99 nights below 20°F to Nobles County's 97 nights. Rock County, MN, 40 km west, gets 94 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Nobles County, MN | - | 168 nights | 97 nights | 5°F |
| Osceola County, IA | 35 km south | 171 nights | 99 nights | 5°F |
| Murray County, MN | 38 km north | 168 nights | 97 nights | 4°F |
| Rock County, MN | 40 km west | 165 nights | 94 nights | 7°F |
| Lyon County, IA | 48 km southwest | 168 nights | 96 nights | 6°F |
| Jackson County, MN | 49 km east | 168 nights | 99 nights | 5°F |
| Pipestone County, MN | 55 km northwest | 173 nights | 104 nights | 5°F |
Nobles County within MN
Nobles County ranks 54 of 87 MN counties for nights below 20°F. The most is St. Louis County, MN at 130 nights, with a 0°F average winter low. The fewest is Winona County, MN: 81 nights, winter lows near 12°F. At 1,665 ft, Nobles County sits 551 ft above the state's median county elevation of 1,114 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 Worthington (2 mi NNE), MN, 15 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.