Shelby County, Ohio · Sidney
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With 34% of homes built before 1960 and about 35 hard-freeze nights a year, frozen and split pipes are a leading winter risk in the county.
July brings the most downpours to Shelby County, part of 6.6 heavy-rain days a year. Check the sump first.
34% 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 Shelby County, 3.37 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 Shelby 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 35 times a year in Shelby County. Mold after a leak spreads fastest from June through August.
Local risk profile
With 20,149 homes and around 47,929 residents, Shelby County is 408 square miles of western Ohio. Besides Sidney, the county seat, the biggest communities are Anna, Fort Loramie and Jackson Center. The county's median home was built in 1974.
62/100 Water Damage Risk Index: Elevated Shelby County ranks 15 of 88 Ohio counties. See the statewide ranking and method.The three factors where Shelby County ranks highest compared with other Ohio counties.
Shelby is on the colder side of Ohio for pipes. 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 -13°F on January 2, 2018.
The freeze season here runs November to March, 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 27 and the last spring freeze around Apr 21.
Heavy rain is a bigger factor here than in most of Ohio. About 6.6 days a year bring an inch or more (25th of 88), most often in July, out of 41.5 inches of total precipitation. On September 8, 2020, 3.37 inches fell in a single day. Multi-day storms matter most for basements; the wettest three days on record here totaled 3.88 inches (through September 9, 2018).
About 80 days a year swing from below freezing at night to above freezing by day. Those freeze-thaw cycles feed ice dams on roofs, open cracks in foundations and driveways, and stress pipes that are already marginal.
Housing
59% of homes in Shelby County predate 1980, close to the Ohio county median of 61.1%, which ranks 48th of Ohio's 88 counties.
The mix runs from 34% built before 1960 to 15% built since 2000, so older neighborhoods bring aging pipe while newer subdivisions bring failed appliance lines and water heaters.
26% date from 1980 to 1999, the window when polybutylene, a gray flexible plastic supply pipe, was used in some homes. It's prone to leaks at the fittings, so it's worth checking for in a house from those years.
Beyond water
About 35 nights a year in Shelby County stay at 65°F or warmer, a sign of muggy summer air (42nd of 88 counties). May is the wettest month. 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 expectBy main heating fuel, Shelby County homes break down as 44% utility gas, 27% electric, 21% propane and 3% wood. Propane 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 Shelby 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 Shelby. Darke County has the oldest housing nearby, with 74% of homes built before 1980.
By the numbers
| Factor | Shelby | Ohio median | Rank |
|---|---|---|---|
| Homes built before 1960 | 34% | 37% | 54 of 88 |
| Homes built before 1980 | 59% | 61% | 48 of 88 |
| Homes built 2000 or later | 15% | 17% | 50 of 88 |
| Manufactured or mobile homes | 3.9% | 5.9% | 62 of 88 |
| Vacant homes | 6.2% | 8.4% | 67 of 88 |
| Wood or propane heat | 24% | 16% | 18 of 88 |
| Nights at 20°F or colder | 35/yr | 31/yr | 12 of 88 |
| Days with 1 inch+ of rain | 6.6/yr | 5.7/yr | 25 of 88 |
| Freeze-thaw days | 80/yr | 82/yr | 55 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 Shelby County: freezing from November to March, heavy rain in March, April 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