Butler County, Ohio · Hamilton
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Pipes freeze in Butler County on about 28 nights a year, mostly November to March. Older homes, 26% of the stock here, are most at risk.
Basements flood here mostly in February. Butler County averages 7.3 days a year with an inch of rain or more.
26% 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.
Butler County's wettest day in the 2015–2024 record brought 2.97 inches, and about 81 freeze-thaw days a year mean ice dams in some winters.
4% of occupied homes in Butler County heat mainly with wood or propane, below the Ohio county median of 15.9%.
About 47 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
About 392,876 people live in Butler County, 467 square miles in southwest Ohio, in roughly 155,372 homes. Besides Hamilton, the county seat, the biggest communities are Middletown, Fairfield and Oxford. Half the homes here were built before 1979, half after.
47/100 Water Damage Risk Index: Elevated Butler County ranks 51 of 88 Ohio counties. See the statewide ranking and method.The three factors where Butler County ranks highest compared with other Ohio counties.
Winters here are on the gentler end for Ohio, and pipes still freeze. In the 2015–2024 record the county logged about 28 nights a year at or below 20°F (63rd of 88) and 99 below freezing. Twenty degrees is roughly where uninsulated pipes start to freeze.
Cold snaps are the real risk. The worst in the record lasted 13 days below freezing (ending January 2018), and the low bottomed out near -10°F on January 3, 2018.
Most freezing nights fall from November to March, 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 29 and end around Apr 17.
Heavy rain is a bigger factor here than in most of Ohio. About 7.3 days a year bring an inch or more (11th of 88), most often in February, out of 45.2 inches of total precipitation. On June 19, 2021, 2.97 inches fell in a single day. The worst three-day stretch dropped 4.67 inches, ending September 10, 2018, the kind of soaking that overwhelms sump pumps and storm sewers.
The temperature crosses 32°F in both directions on roughly 81 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 52% of the county's housing was built before 1980. That puts Butler among the newer housing stocks of Ohio's 88 counties.
22% of homes were built in 2000 or later, more than in most of Ohio. Newer plumbing rarely corrodes, so damage here tends to come from appliance supply lines, water heaters, sump pumps 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.
Beyond water
Butler County averages 47 warm, muggy nights a year (lows of 65°F or more) and gets the most rain in June. The EPA recommends keeping indoor humidity below 60%, ideally 30 to 50%. Basements can pass 60% on their own in summer, so a dehumidifier matters even without a leak, and anything wet should be dried within 24 to 48 hours.
Mold remediation: what to expectMain heating fuel in Butler County's occupied homes: 52% utility gas, 40% electric, 3% 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 Butler County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Preble gets more pipe-freeze nights than Butler. Montgomery County has the oldest housing nearby, with 74% of homes built before 1980.
By the numbers
| Factor | Butler | Ohio median | Rank |
|---|---|---|---|
| Homes built before 1960 | 26% | 37% | 77 of 88 |
| Homes built before 1980 | 52% | 61% | 71 of 88 |
| Homes built 2000 or later | 22% | 17% | 18 of 88 |
| Manufactured or mobile homes | 2.3% | 5.9% | 72 of 88 |
| Vacant homes | 5.5% | 8.4% | 74 of 88 |
| Wood or propane heat | 3.5% | 16% | 79 of 88 |
| Nights at 20°F or colder | 28/yr | 31/yr | 63 of 88 |
| Days with 1 inch+ of rain | 7.3/yr | 5.7/yr | 11 of 88 |
| Freeze-thaw days | 81/yr | 82/yr | 52 of 88 |
| Muggy nights (65°F+) | 47/yr | 35/yr | 6 of 88 |
Rank 1 is the highest value. Bars run from the lowest to the highest Ohio county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Butler County: freezing from November to March, heavy rain in February, March 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