Huron County, Ohio · Norwalk
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Huron County averages 34 nights a year at 20°F or colder, mostly November to March, and 41% of its homes predate 1960.
June brings the most downpours to Huron County, part of 3.9 heavy-rain days a year. Check the sump first.
Backups often follow heavy rain, which Huron County gets about 3.9 days a year, when storm water overloads sewer mains and pushes up through the lowest drain in the house.
In Huron County, 3.94 inches fell on the wettest day of the 2015–2024 record. Storms like that, and ice dams in snowy winters, cause most roof leaks.
16% of occupied homes in Huron County heat mainly with wood or propane, close to the Ohio county median of 15.9%.
Muggy summer nights, lows of 65°F or more, come about 31 times a year in Huron County. Mold after a leak spreads fastest from June through August.
Local risk profile
With 25,597 homes and around 58,319 residents, Huron County is 492 square miles of northern Ohio. The county seat is Norwalk, and Bellevue, Willard and New London round out the largest towns. Half the homes here were built before 1968, half after.
49/100 Water Damage Risk Index: Elevated Huron County ranks 45 of 88 Ohio counties. See the statewide ranking and method.The three factors where Huron County ranks highest compared with other Ohio counties.
Huron County gets more hard-freeze nights than most of Ohio. In the 2015–2024 record the county logged about 34 nights a year at or below 20°F (21st of 88) and 113 below freezing. Twenty degrees is roughly where uninsulated pipes start to freeze.
On February 20, 2015 the low fell to about -12°F, and in the stretch ending March 2015 the county went 19 days in a row below freezing. Leaks from split pipes typically appear the day the thaw arrives.
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 30 and end around Apr 24.
Huron gets fewer downpours than most Ohio counties, but they still fill basements. The county gets about 38.9 inches of rain and melted snow a year, with 3.9 days of an inch or more (78th of 88). Those downpours cluster in June, July and October, when sump pumps and gutters are tested hardest. The wettest day on record brought 3.94 inches on August 24, 2023. The worst three-day stretch dropped 4.79 inches, ending August 26, 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 83 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
Roughly 67% of the county's housing was built before 1980. That puts Huron among the oldest housing stocks of Ohio's 88 counties.
Before 1960 is when 41% of these homes went up. Galvanized supply lines and cast iron drains were standard then, and after 60-plus years both corrode and crack, often out of sight inside a wall or under a slab.
Here 8% 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.
Beyond water
Summer nights that don't drop below 65°F, a good marker of humid air, come about 31 times a year here, below the Ohio county median of 35. Mold grows when indoor humidity stays above about 60%, the EPA's ceiling. A basement dehumidifier set to 50% and drying anything wet within 24 to 48 hours prevents most problems.
Mold remediation: what to expectHeating fuel matters for fire risk. In Huron County it's 55% utility gas, 26% electric, 13% propane and 3% wood. Fires here are likelier to start in the kitchen or the wiring than in the furnace. After any fire, keep the HVAC off until ducts are checked, or soot will travel through the house.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Huron County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Ashland, Crawford and Richland get more pipe-freeze nights than Huron. Crawford County has the oldest housing nearby, with 80% of homes built before 1980.
By the numbers
| Factor | Huron | Ohio median | Rank |
|---|---|---|---|
| Homes built before 1960 | 41% | 37% | 31 of 88 |
| Homes built before 1980 | 67% | 61% | 28 of 88 |
| Homes built 2000 or later | 13% | 17% | 63 of 88 |
| Manufactured or mobile homes | 7.5% | 5.9% | 31 of 88 |
| Vacant homes | 8.2% | 8.4% | 47 of 88 |
| Wood or propane heat | 16% | 16% | 45 of 88 |
| Nights at 20°F or colder | 34/yr | 31/yr | 21 of 88 |
| Days with 1 inch+ of rain | 3.9/yr | 5.7/yr | 78 of 88 |
| Freeze-thaw days | 83/yr | 82/yr | 38 of 88 |
| Muggy nights (65°F+) | 31/yr | 35/yr | 59 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 Huron County: freezing from November to March, heavy rain in June, July and October.
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