Auglaize County, Ohio · Wapakoneta
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Auglaize County averages 35 nights a year at 20°F or colder, mostly November to March, and 44% of its homes predate 1960.
Heavy rain days of an inch or more come about 6.3 times a year here, most often in June. A sump pump that hasn't run since last season is a common weak point.
Sewage backups in Auglaize County spike on heavy-rain days, about 6.3 a year, when sewer mains fill up and water finds the lowest drain.
Roof leaks here come from summer downpours and, with about 79 freeze-thaw days a year, from winter ice dams. Most show up as ceiling stains in the room below.
20% of occupied homes in Auglaize County heat mainly with wood or propane, above the Ohio county median of 15.9%.
About 35 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
With 20,056 homes and around 46,125 residents, Auglaize County is 401 square miles of western Ohio. Wapakoneta is the county seat; St. Marys, Minster and New Bremen are the next largest communities. Half the homes here were built before 1970, half after.
73/100 Water Damage Risk Index: High Auglaize County ranks 3 of 88 Ohio counties. See the statewide ranking and method.The three factors where Auglaize County ranks highest compared with other Ohio counties.
Auglaize County gets more hard-freeze nights than most of Ohio. In the 2015–2024 record the county logged about 35 nights a year at or below 20°F (12th of 88) and 109 below freezing. Twenty degrees is roughly where uninsulated pipes start to freeze.
Cold snaps are the real risk. The worst in the record lasted 19 days below freezing (ending March 2015), and the low bottomed out near -12°F on January 2, 2018.
Expect the hardest freezes in January, inside a season that runs November to March. That's when an outdoor spigot left connected to a hose, or a pipe in a crawl space, is most likely to split.
Freezing nights typically start around Oct 27 and end around Apr 24.
Heavy rain is a bigger factor here than in most of Ohio. About 6.3 days a year bring an inch or more (29th of 88), most often in June, out of 41 inches of total precipitation. On September 8, 2020, 3.64 inches fell in a single day. The worst three-day stretch dropped 4.44 inches, ending June 28, 2015, the kind of soaking that overwhelms sump pumps and storm sewers.
The temperature crosses 32°F in both directions on roughly 79 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
Ohio's 88 counties range widely in housing age; Auglaize ranks 30th, with 67% of its homes built before 1980.
44% were built before 1960. Homes from that era often still have galvanized steel supply pipe, which rusts from the inside until it pinholes, and cast iron drains that crack with age. Slow leaks behind walls are a common start to water damage in these houses.
Beyond water
Auglaize County averages 35 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 Auglaize County's occupied homes: 53% utility gas, 23% electric, 17% propane and 3% wood. Propane heat is more common here than in most Ohio counties. Heating equipment is one of the leading causes of home fires nationally, and the NFPA recommends having chimneys and vents inspected every year.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Auglaize County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Logan gets more pipe-freeze nights than Auglaize. Allen County has the oldest housing nearby, with 73% of homes built before 1980.
By the numbers
| Factor | Auglaize | Ohio median | Rank |
|---|---|---|---|
| Homes built before 1960 | 44% | 37% | 19 of 88 |
| Homes built before 1980 | 67% | 61% | 30 of 88 |
| Homes built 2000 or later | 14% | 17% | 58 of 88 |
| Manufactured or mobile homes | 3.1% | 5.9% | 69 of 88 |
| Vacant homes | 5.6% | 8.4% | 73 of 88 |
| Wood or propane heat | 20% | 16% | 32 of 88 |
| Nights at 20°F or colder | 35/yr | 31/yr | 12 of 88 |
| Days with 1 inch+ of rain | 6.3/yr | 5.7/yr | 29 of 88 |
| Freeze-thaw days | 79/yr | 82/yr | 64 of 88 |
| Muggy nights (65°F+) | 35/yr | 35/yr | 42 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 Auglaize County: freezing from November to March, 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