Wyandot County, Ohio · Upper Sandusky
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With 49% of homes built before 1960 and about 31 hard-freeze nights a year, frozen and split pipes are a leading winter risk in the county.
June brings the most downpours to Wyandot County, part of 3.7 heavy-rain days a year. Check the sump first.
49% 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.
Wyandot County's wettest day in the 2015–2024 record brought 2.98 inches, and about 75 freeze-thaw days a year mean ice dams in some winters.
24% of occupied homes in Wyandot County heat mainly with wood or propane, above the Ohio county median of 15.9%.
Muggy summer nights, lows of 65°F or more, come about 40 times a year in Wyandot County. Mold after a leak spreads fastest from June through August.
Local risk profile
With 9,892 homes and around 21,598 residents, Wyandot County is 407 square miles of central Ohio. Besides Upper Sandusky, the county seat, the biggest communities are Carey, Nevada and Sycamore. Half the homes here were built before 1962, half after.
56/100 Water Damage Risk Index: Elevated Wyandot County ranks 30 of 88 Ohio counties. See the statewide ranking and method.The three factors where Wyandot County ranks highest compared with other Ohio counties.
Pipe-freeze risk in Wyandot County sits near the middle of the state. It averaged 102 freezing nights a year over 2015–2024, 31 of them at 20°F or colder, cold enough for pipes in outside walls and crawl spaces to freeze. Among 88 Ohio counties that's 42nd.
Cold snaps are the real risk. The worst in the record lasted 18 days below freezing (ending March 2015), and the low bottomed out near -8°F on February 20, 2015.
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 Nov 2 and end around Apr 17.
Wyandot gets fewer downpours than most Ohio counties, but they still fill basements. About 3.7 days a year bring an inch or more (80th of 88), most often in June, out of 36.5 inches of total precipitation. On August 24, 2023, 2.98 inches fell in a single day. The worst three-day stretch dropped 3.43 inches, ending August 25, 2023, the kind of soaking that overwhelms sump pumps and storm sewers.
Freeze-thaw days, below freezing overnight and above it by afternoon, come about 75 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
Ohio's 88 counties range widely in housing age; Wyandot ranks 21st, with 70% of its homes built before 1980.
49% 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
About 40 nights a year in Wyandot County stay at 65°F or warmer, a sign of muggy summer air (24th of 88 counties). June is the wettest month. 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 Wyandot County's occupied homes: 44% utility gas, 28% electric, 20% propane and 4% 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 Wyandot County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Crawford, Hardin, Marion and Seneca get more pipe-freeze nights than Wyandot. Crawford County has the oldest housing nearby, with 80% of homes built before 1980.
By the numbers
| Factor | Wyandot | Ohio median | Rank |
|---|---|---|---|
| Homes built before 1960 | 49% | 37% | 7 of 88 |
| Homes built before 1980 | 70% | 61% | 21 of 88 |
| Homes built 2000 or later | 12% | 17% | 66 of 88 |
| Manufactured or mobile homes | 6% | 5.9% | 43 of 88 |
| Vacant homes | 9% | 8.4% | 37 of 88 |
| Wood or propane heat | 24% | 16% | 18 of 88 |
| Nights at 20°F or colder | 31/yr | 31/yr | 42 of 88 |
| Days with 1 inch+ of rain | 3.7/yr | 5.7/yr | 80 of 88 |
| Freeze-thaw days | 75/yr | 82/yr | 77 of 88 |
| Muggy nights (65°F+) | 40/yr | 35/yr | 24 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 Wyandot County: freezing from November to March, heavy rain in June, July and November.
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