Oakland County, Michigan · Pontiac
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Pipes freeze in Oakland County on about 44 nights a year, mostly November to March. Older homes, 28% of the stock here, are most at risk.
August brings the most downpours to Oakland County, part of 4.5 heavy-rain days a year. Check the sump first.
28% of homes here predate 1960, when clay and cast iron sewer laterals were standard. Roots and cracks in those lines are a common cause of backups.
Oakland County's wettest day in the 2015–2024 record brought 2.99 inches, and about 86 freeze-thaw days a year mean ice dams in some winters.
2% of occupied homes in Oakland County heat mainly with wood or propane, below the Michigan county median of 29%.
About 24 nights a year here stay at 65°F or warmer, so basements and crawl spaces can grow mold even without a leak.
Local risk profile
Oakland County covers 867 square miles of southeast Michigan, with about 1,279,825 residents and 561,348 homes. The county seat is Pontiac, and Troy, Farmington Hills and Rochester Hills round out the largest towns. Half the homes here were built before 1975, half after.
51/100 Water Damage Risk Index: Elevated Oakland County ranks 39 of 83 Michigan counties. See the statewide ranking and method.The three factors where Oakland County ranks highest compared with other Michigan counties.
Winters here are on the gentler end for Michigan, and pipes still freeze. From 2015–2024 it averaged 44 nights a year at 20°F or colder, the range where pipes in exterior walls, crawl spaces and unheated garages freeze, and 126 nights at or below 32°F. That ranks 58th of 83 counties.
The longest cold spell was straight 22 days without the temperature rising above freezing, ending in March 2015. The coldest night reached about -18°F on February 20, 2015. Burst pipes usually show up when a spell like that breaks and the ice thaws.
The freeze season here runs November to March, with January the coldest. If you travel then, leave the thermostat at 55°F or above and open sink cabinets on outside walls.
Freezing nights typically start around Oct 22 and end around Apr 28.
Heavy rain is a bigger factor here than in most of Michigan. Of roughly 34.9 inches of yearly precipitation, the damage comes from the 4.5 days a year with an inch or more, ranked 27th of 83. March, May and August see the most. The single wettest day in the record: 2.99 inches, June 26, 2021. The worst three-day stretch dropped 3.74 inches, ending September 24, 2021, the kind of soaking that overwhelms sump pumps and storm sewers.
The temperature crosses 32°F in both directions on roughly 86 days a year. Each cycle melts and refreezes water at roof edges and in foundation cracks, which is how ice dams and basement seepage get started.
Housing
Roughly 58% of the county's housing was built before 1980. That puts Oakland near the middle of Michigan's 83 counties.
Older and newer homes sit side by side here: 28% predate 1960 and 16% are from 2000 or later. Corroded pipe is the typical failure in the first group, burst supply hoses in the second.
About 26% 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.
Renters occupy 27% 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
Summer nights that don't drop below 65°F, a good marker of humid air, come about 24 times a year here, above the Michigan county median of 10. 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 expectHeating fuel matters for fire risk. In Oakland County it's 86% utility gas, 11% electric, 2% propane and under 1% 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 Oakland County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Genesee, Lapeer, Livingston and Washtenaw get more pipe-freeze nights than Oakland. Wayne County has the oldest housing nearby, with 80% of homes built before 1980.
By the numbers
| Factor | Oakland | Michigan median | Rank |
|---|---|---|---|
| Homes built before 1960 | 28% | 32% | 50 of 83 |
| Homes built before 1980 | 58% | 58% | 43 of 83 |
| Homes built 2000 or later | 16% | 16% | 43 of 83 |
| Manufactured or mobile homes | 2.8% | 7.3% | 78 of 83 |
| Vacant homes | 5.5% | 20% | 76 of 83 |
| Wood or propane heat | 1.9% | 29% | 81 of 83 |
| Nights at 20°F or colder | 44/yr | 54/yr | 58 of 83 |
| Days with 1 inch+ of rain | 4.5/yr | 3.9/yr | 27 of 83 |
| Freeze-thaw days | 86/yr | 95/yr | 73 of 83 |
| Muggy nights (65°F+) | 24/yr | 10/yr | 9 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 Oakland County: freezing from November to March, heavy rain in March, May and August.
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