Alpena County, Michigan · Alpena
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With 39% of homes built before 1960 and about 65 hard-freeze nights a year, frozen and split pipes are a leading winter risk in the county.
Heavy rain days of an inch or more come about 1.9 times a year here, most often in April. A sump pump that hasn't run since last season is a common weak point.
39% 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.
In Alpena County, 2.52 inches fell on the wettest day of the 2015–2024 record. Storms like that, and ice dams in snowy winters, cause most roof leaks.
24% of occupied homes in Alpena County heat mainly with wood or propane, below the Michigan county median of 29%.
Muggy summer nights, lows of 65°F or more, come about 5 times a year in Alpena County. Mold after a leak spreads fastest from June through August.
Local risk profile
Alpena County covers 572 square miles of northern Lower Michigan, with about 28,880 residents and 15,707 homes. Alpena is the county seat; Ossineke is the next largest community. The county's median home was built in 1968.
47/100 Water Damage Risk Index: Elevated Alpena County ranks 48 of 83 Michigan counties. See the statewide ranking and method.The three factors where Alpena County ranks highest compared with other Michigan counties.
Alpena is on the colder side of Michigan for pipes. In the 2015–2024 record the county logged about 65 nights a year at or below 20°F (26th of 83) and 155 below freezing. Twenty degrees is roughly where uninsulated pipes start to freeze.
The longest cold spell was straight 41 days without the temperature rising above freezing, ending in March 2015. The coldest night reached about -22°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 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 19 and the last spring freeze around May 11.
Alpena gets fewer downpours than most Michigan counties, but they still fill basements. About 1.9 days a year bring an inch or more (80th of 83), most often in April, out of 31.5 inches of total precipitation. On October 24, 2017, 2.52 inches fell in a single day. Multi-day storms matter most for basements; the wettest three days on record here totaled 3.34 inches (through June 23, 2024).
Freeze-thaw days, below freezing overnight and above it by afternoon, come about 102 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
Roughly 72% of the county's housing was built before 1980. That puts Alpena among the oldest housing stocks of Michigan's 83 counties.
In Alpena County 39% of homes are older than 1960. If yours is one of them and the plumbing has never been replaced, expect galvanized steel supply pipe and cast iron drain lines, the two materials most likely to fail quietly.
Beyond water
Alpena County averages 5 warm, muggy nights a year (lows of 65°F or more) and gets the most rain in April. Mold grows when indoor humidity stays above about 60%, the EPA's ceiling. A basement dehumidifier set to 50% and drying anything wet within 24 to 48 hours prevents most problems.
Mold remediation: what to expectBy main heating fuel, Alpena County homes break down as 64% utility gas, 9% electric, 15% propane and 9% wood. Wood heat is more common here than the state median. Have chimneys swept and fuel-burning appliances serviced each fall, and keep three feet clear around stoves and space heaters.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Alpena County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Montmorency and Presque Isle get more pipe-freeze nights than Alpena. Its housing is the oldest in the area by share of homes built before 1980.
By the numbers
| Factor | Alpena | Michigan median | Rank |
|---|---|---|---|
| Homes built before 1960 | 39% | 32% | 24 of 83 |
| Homes built before 1980 | 72% | 58% | 5 of 83 |
| Homes built 2000 or later | 10% | 16% | 78 of 83 |
| Manufactured or mobile homes | 4.9% | 7.3% | 66 of 83 |
| Vacant homes | 17% | 20% | 48 of 83 |
| Wood or propane heat | 24% | 29% | 55 of 83 |
| Nights at 20°F or colder | 65/yr | 54/yr | 26 of 83 |
| Days with 1 inch+ of rain | 1.9/yr | 3.9/yr | 80 of 83 |
| Freeze-thaw days | 102/yr | 95/yr | 16 of 83 |
| Muggy nights (65°F+) | 5/yr | 10/yr | 57 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 Alpena County: freezing from November to April, heavy rain in April, June and July.
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