Chippewa County, Michigan · Sault Ste. Marie
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Pipes freeze in Chippewa County on about 84 nights a year, mostly November to April. Older homes, 34% of the stock here, are most at risk.
Heavy rain days of an inch or more come about 3.1 times a year here, most often in July. A sump pump that hasn't run since last season is a common weak point.
Backups often follow heavy rain, which Chippewa County gets about 3.1 days a year, when storm water overloads sewer mains and pushes up through the lowest drain in the house.
Roof leaks here come from summer downpours and, with about 100 freeze-thaw days a year, from winter ice dams. Most show up as ceiling stains in the room below.
30% of occupied homes in Chippewa County heat mainly with wood or propane, close to the Michigan county median of 29%.
Muggy summer nights, lows of 65°F or more, come about 2 times a year in Chippewa County. Mold after a leak spreads fastest from June through August.
Local risk profile
With 20,348 homes and around 36,295 residents, Chippewa County is 1,559 square miles of Michigan's Upper Peninsula. The county seat is Sault Ste. Marie, and Kincheloe, Brimley and De Tour Village round out the largest towns. The county's median home was built in 1976.
50/100 Water Damage Risk Index: Elevated Chippewa County ranks 42 of 83 Michigan counties. See the statewide ranking and method.The three factors where Chippewa County ranks highest compared with other Michigan counties.
Chippewa is on the colder side of Michigan for pipes. From 2015–2024 it averaged 84 nights a year at 20°F or colder, the range where pipes in exterior walls, crawl spaces and unheated garages freeze, and 174 nights at or below 32°F. That ranks 14th of 83 counties.
Cold snaps are the real risk. The worst in the record lasted 44 days below freezing (ending February 2019), and the low bottomed out near -27°F on February 20, 2015.
The freeze season here runs November to April, with January the coldest. If you travel then, leave the thermostat at 55°F or above and open sink cabinets on outside walls.
On average the first fall freeze arrives around Oct 13 and the last spring freeze around May 18.
Chippewa gets fewer downpours than most Michigan counties, but they still fill basements. About 3.1 days a year bring an inch or more (67th of 83), most often in July, out of 35.7 inches of total precipitation. On October 4, 2018, 2.13 inches fell in a single day. Multi-day storms matter most for basements; the wettest three days on record here totaled 3.39 inches (through October 25, 2017).
Freeze-thaw days, below freezing overnight and above it by afternoon, come about 100 times a year here. They're the main driver of ice dams and of water working its way through foundation cracks in late winter.
Housing
Michigan's 83 counties range widely in housing age; Chippewa ranks 55th, with 56% of its homes built before 1980.
Older and newer homes sit side by side here: 34% predate 1960 and 19% are from 2000 or later. Corroded pipe is the typical failure in the first group, burst supply hoses in the second.
About 25% of homes went up between 1980 and 1999. Some houses from the late 1970s to the mid-1990s were plumbed with polybutylene, a gray plastic pipe known for failing at fittings. A plumber can tell you in a few minutes whether you have it.
8% of homes are manufactured or mobile homes, close to the Michigan county median of 7.3%. Their water lines run under the floor behind the skirting, so a torn skirt or failed heat tape freezes them faster than lines in a site-built house.
With 31% of homes empty at survey time, landlords and seasonal owners should shut off the main or schedule checks in winter. An unheated vacant house is also where many policies limit freeze coverage.
Renters occupy 25% of homes. If you rent, the building is usually the landlord's to repair, but your belongings are only covered by renters insurance.
Beyond water
Chippewa County averages 2 warm, muggy nights a year (lows of 65°F or more) and gets the most rain in October. Keep indoor humidity under 60%, as the EPA advises, and dry any leak within 24 to 48 hours; in a humid month a wet basement left alone won't dry by itself.
Mold remediation: what to expectMain heating fuel in Chippewa County's occupied homes: 48% utility gas, 17% electric, 25% propane and 5% wood. Most homes here heat with gas or electricity, so cooking and electrical faults are the likelier fire sources. Even a contained kitchen fire can send soot through the ductwork to every room.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Chippewa County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Luce gets more pipe-freeze nights than Chippewa. Presque Isle County has the oldest housing nearby, with 64% of homes built before 1980.
By the numbers
| Factor | Chippewa | Michigan median | Rank |
|---|---|---|---|
| Homes built before 1960 | 34% | 32% | 34 of 83 |
| Homes built before 1980 | 56% | 58% | 55 of 83 |
| Homes built 2000 or later | 19% | 16% | 24 of 83 |
| Manufactured or mobile homes | 8.2% | 7.3% | 30 of 83 |
| Vacant homes | 31% | 20% | 31 of 83 |
| Wood or propane heat | 30% | 29% | 41 of 83 |
| Nights at 20°F or colder | 84/yr | 54/yr | 14 of 83 |
| Days with 1 inch+ of rain | 3.1/yr | 3.9/yr | 67 of 83 |
| Freeze-thaw days | 100/yr | 95/yr | 23 of 83 |
| Muggy nights (65°F+) | 2/yr | 10/yr | 70 of 83 |
Rank 1 is the highest value. Bars run from the lowest to the highest Michigan county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Chippewa County: freezing from November to April, heavy rain in June, July and October.
Sources: U.S. Census Bureau, ACS 2024 5-year estimates (2020-2024); weather from NOAA nClimGrid-Daily county averages (EpiNOAA), 2015–2024, averaged across the county; county boundaries from Census TIGER. Reviewed 2026-10-21. Methodology