Will Pipes Freeze in Hillsdale County, MI? 66 nights a Year
Freeze nights in Hillsdale County
In a normal year Hillsdale County, MI gets 66 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 75% of US counties.
Risk level: Severe. The risk season runs November to April, worst in January.
It depends where the pipe is
| Pipe | Freezes near | Nights a year |
|---|---|---|
| Outdoor spigot, open crawlspace | 32°F | 148 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 66 nights |
| Insulated pipe in unheated space | 10°F | 27 nights |
| Inside the heated house | 0°F | 10 nights |
Foam-sleeving a bare pipe in unheated space takes it from 66 nights of risk to 27 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 10/12, last around 05/03. For 20°F: 11/17 to 04/01.
How cold Hillsdale County nights get
Average winter (Dec-Feb) low: 18°F; the coldest month, January, averages 15°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, December: 27 nights a year, and 10 nights below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 15°F | 16°F | 25°F | 35°F | 47°F | 57°F | 60°F | 58°F | 50°F | 40°F | 30°F | 22°F |
Hillsdale County next to its neighbours
Branch County, MI, 36 km west, gets 56 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Hillsdale County, MI | - | 148 nights | 66 nights | 15°F |
| Branch County, MI | 36 km west | 137 nights | 56 nights | 16°F |
| Jackson County, MI | 40 km northeast | 137 nights | 57 nights | 17°F |
| Williams County, OH | 41 km south | 144 nights | 61 nights | 17°F |
| Steuben County, IN | 44 km southwest | 145 nights | 63 nights | 16°F |
| Lenawee County, MI | 47 km east | 135 nights | 53 nights | 17°F |
| Calhoun County, MI | 47 km northwest | 135 nights | 57 nights | 17°F |
Hillsdale County within MI
Hillsdale County ranks 44 of 83 MI counties for nights below 20°F. The most is Iron County, MI at 120 nights, with a 3°F average winter low. The fewest is Allegan County, MI: 38 nights, winter lows near 24°F. At 1,082 ft, Hillsdale County sits 274 ft above the state's median county elevation of 808 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 Hillsdale, MI, 1 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.