Aitkin County, Minnesota · Aitkin
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With 22% of homes built before 1960 and about 103 hard-freeze nights a year, frozen and split pipes are a leading winter risk in the county.
Basements flood here mostly in July. Aitkin County averages 4.1 days a year with an inch of rain or more.
22% 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.
Aitkin County's wettest day in the 2015–2024 record brought 3.36 inches, and about 90 freeze-thaw days a year mean ice dams in some winters.
64% of occupied homes in Aitkin County heat mainly with wood or propane, above the Minnesota county median of 30%.
Muggy summer nights, lows of 65°F or more, come about 2 times a year in Aitkin County. Mold after a leak spreads fastest from June through August.
Local risk profile
With 14,253 homes and around 16,056 residents, Aitkin County is 1,821 square miles of central Minnesota. Besides Aitkin, the county seat, the biggest communities are Hill City, McGregor and Palisade. Half the homes here were built before 1982, half after.
38/100 Water Damage Risk Index: Moderate Aitkin County ranks 71 of 87 Minnesota counties. See the statewide ranking and method.The three factors where Aitkin County ranks highest compared with other Minnesota counties.
Aitkin County gets more hard-freeze nights than most of Minnesota. It averaged 178 freezing nights a year over 2015–2024, 103 of them at 20°F or colder, cold enough for pipes in outside walls and crawl spaces to freeze. Among 87 Minnesota counties that's 22nd.
The longest cold spell was straight 59 days without the temperature rising above freezing, ending in March 2019. The coldest night reached about -39°F on January 31, 2019. Burst pipes usually show up when a spell like that breaks and the ice thaws.
Most freezing nights fall from November to April, peaking in January. Disconnect garden hoses and shut off outdoor spigots before the first hard frost, and keep the heat at 55°F or higher if you'll be away.
Freezing nights typically start around Oct 7 and end around May 10.
Aitkin gets fewer downpours than most Minnesota counties, but they still fill basements. Of roughly 29.8 inches of yearly precipitation, the damage comes from the 4.1 days a year with an inch or more, ranked 62nd of 87. June, July and September see the most. The single wettest day in the record: 3.36 inches, July 12, 2016. The worst three-day stretch dropped 4.74 inches, ending July 12, 2016, the kind of soaking that overwhelms sump pumps and storm sewers.
The temperature crosses 32°F in both directions on roughly 90 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
Minnesota's 87 counties range widely in housing age; Aitkin ranks 66th, with 47% of its homes built before 1980.
Since 2000 the county has added enough housing that 27% of homes are that new. Modern PEX and copper rarely fail on their own; the leaks come from connections, appliances and storms.
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.
Here 11% of housing is manufactured homes. Check the skirting and the heat tape on the main water line every fall, because that one exposed line is what freezes.
49% of homes were vacant at survey time. A leak in an empty rental or seasonal house can run for days before anyone notices, which is why those losses tend to be larger.
Beyond water
Aitkin County averages 2 warm, muggy nights a year (lows of 65°F or more) and gets the most rain in July. 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 Aitkin County it's 13% utility gas, 19% electric, 53% propane and 11% wood. Wood and propane heat are 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 Aitkin County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Carlton, Cass, Itasca and St. Louis get more pipe-freeze nights than Aitkin. St. Louis County has the oldest housing nearby, with 70% of homes built before 1980.
By the numbers
| Factor | Aitkin | Minnesota median | Rank |
|---|---|---|---|
| Homes built before 1960 | 22% | 34% | 67 of 87 |
| Homes built before 1980 | 47% | 58% | 66 of 87 |
| Homes built 2000 or later | 27% | 21% | 25 of 87 |
| Manufactured or mobile homes | 11% | 3.8% | 7 of 87 |
| Vacant homes | 49% | 11% | 2 of 87 |
| Wood or propane heat | 64% | 30% | 1 of 87 |
| Nights at 20°F or colder | 103/yr | 89/yr | 22 of 87 |
| Days with 1 inch+ of rain | 4.1/yr | 5.3/yr | 62 of 87 |
| Freeze-thaw days | 90/yr | 86/yr | 13 of 87 |
| Muggy nights (65°F+) | 2/yr | 13/yr | 79 of 87 |
Rank 1 is the highest value. Bars run from the lowest to the highest Minnesota county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Aitkin County: freezing from November to April, heavy rain in June, July and September.
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