Benton County, Iowa · Vinton
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With 46% of homes built before 1960 and about 66 hard-freeze nights a year, frozen and split pipes are a leading winter risk in the county.
Heavy rain days of an inch or more come about 6.5 times a year here, most often in September. A sump pump that hasn't run since last season is a common weak point.
Backups often follow heavy rain, which Benton County gets about 6.5 days a year, when storm water overloads sewer mains and pushes up through the lowest drain in the house.
In Benton County, 3.57 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 Benton County heat mainly with wood or propane, close to the Iowa county median of 22.1%.
About 24 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
Benton County covers 716 square miles of eastern Iowa, with about 25,724 residents and 11,114 homes. The county seat is Vinton, and Belle Plaine, Atkins and Urbana round out the largest towns. Half the homes here were built before 1964, half after.
43/100 Water Damage Risk Index: Moderate Benton County ranks 69 of 99 Iowa counties. See the statewide ranking and method.The three factors where Benton County ranks highest compared with other Iowa counties.
Pipe-freeze risk in Benton County sits near the middle of the state. It averaged 148 freezing nights a year over 2015–2024, 66 of them at 20°F or colder, cold enough for pipes in outside walls and crawl spaces to freeze. Among 99 Iowa counties that's 36th.
The longest cold spell was straight 17 days without the temperature rising above freezing, ending in February 2019. The coldest night reached about -32°F on January 31, 2019. Burst pipes usually show up when a spell like that breaks and the ice thaws.
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.
Freezing nights typically start around Oct 14 and end around Apr 29.
Benton gets fewer downpours than most Iowa counties, but they still fill basements. Of roughly 34.2 inches of yearly precipitation, the damage comes from the 6.5 days a year with an inch or more, ranked 71st of 99. June, August and September see the most. The single wettest day in the record: 3.57 inches, August 12, 2016. The worst three-day stretch dropped 4.03 inches, ending September 3, 2018, the kind of soaking that overwhelms sump pumps and storm sewers.
About 98 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
Roughly 64% of the county's housing was built before 1980. That puts Benton among the newer housing stocks of Iowa's 99 counties.
Housing age is mixed: 46% of homes are pre-1960 and 16% are 2000 or newer. Ask any plumber which era your house is from and you'll know which failures to watch for.
Beyond water
Summer nights that don't drop below 65°F, a good marker of humid air, come about 24 times a year here, below the Iowa county median of 29. 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 expectHeating fuel matters for fire risk. In Benton County it's 55% utility gas, 19% electric, 21% propane and 3% wood. Wood heat is above the Iowa norm. Annual chimney and vent inspection, which the NFPA recommends, is one of the most effective fire-prevention habits for these homes.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Benton County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Buchanan gets more pipe-freeze nights than Benton. Tama County has the oldest housing nearby, with 76% of homes built before 1980.
By the numbers
| Factor | Benton | Iowa median | Rank |
|---|---|---|---|
| Homes built before 1960 | 46% | 48% | 55 of 99 |
| Homes built before 1980 | 64% | 73% | 78 of 99 |
| Homes built 2000 or later | 16% | 13% | 36 of 99 |
| Manufactured or mobile homes | 2.9% | 3.2% | 55 of 99 |
| Vacant homes | 8.2% | 9.5% | 69 of 99 |
| Wood or propane heat | 24% | 22% | 48 of 99 |
| Nights at 20°F or colder | 66/yr | 62/yr | 36 of 99 |
| Days with 1 inch+ of rain | 6.5/yr | 7.1/yr | 71 of 99 |
| Freeze-thaw days | 98/yr | 94/yr | 3 of 99 |
| Muggy nights (65°F+) | 24/yr | 29/yr | 66 of 99 |
Rank 1 is the highest value. Bars run from the lowest to the highest Iowa county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Benton County: freezing from November to March, heavy rain in June, August 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