Polk County, Tennessee · Benton
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Polk County averages 8 nights a year at 20°F or colder, mostly December to February, and 16% of its homes predate 1960.
Heavy rain days of an inch or more come about 13 times a year here, most often in December. A sump pump that hasn't run since last season is a common weak point.
Backups often follow heavy rain, which Polk County gets about 13 days a year, when storm water overloads sewer mains and pushes up through the lowest drain in the house.
In Polk County, 3.68 inches fell on the wettest day of the 2015–2024 record. Storms like that, and ice dams in snowy winters, cause most roof leaks.
23% of occupied homes in Polk County heat mainly with wood or propane, above the Tennessee county median of 7.8%.
With 64 muggy nights a year, mold in Polk County can appear within days of a leak. Dry first, then clean.
Local risk profile
With 9,064 homes and around 17,898 residents, Polk County is 435 square miles of southeast Tennessee. Besides Benton, the county seat, the biggest communities are Delano, Copperhill and Ducktown. Much of its housing is recent, with a median build year of 1988.
27/100 Water Damage Risk Index: Moderate Polk County ranks 92 of 95 Tennessee counties. See the statewide ranking and method.The three factors where Polk County ranks highest compared with other Tennessee counties.
Winters here are on the gentler end for Tennessee, and pipes still freeze. From 2015–2024 it averaged 8 nights a year at 20°F or colder, the range where pipes in exterior walls, crawl spaces and unheated garages freeze, and 65 nights at or below 32°F. That ranks 81st of 95 counties.
Cold snaps are the real risk. The worst in the record lasted 3 days below freezing (ending February 2015), and the low bottomed out near 3°F on December 24, 2022.
The freeze season here runs December to February, 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 Nov 3 and end around Apr 1.
Polk gets fewer downpours than most Tennessee counties, but they still fill basements. About 13 days a year bring an inch or more (70th of 95), most often in December, out of 60.6 inches of total precipitation. On February 6, 2020, 3.68 inches fell in a single day. The worst three-day stretch dropped 5.96 inches, ending August 18, 2021, the kind of soaking that overwhelms sump pumps and storm sewers.
The temperature crosses 32°F in both directions on roughly 63 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
Tennessee's 95 counties range widely in housing age; Polk ranks 56th, with 40% of its homes built before 1980.
The mix runs from 16% built before 1960 to 28% built since 2000, so older neighborhoods bring aging pipe while newer subdivisions bring failed appliance lines and water heaters.
About 33% of homes went up between 1980 and 1999. Some houses from the late 1970s to the mid-1990s were plumbed with polybutylene, a gray plastic pipe known for failing at fittings. A plumber can tell you in a few minutes whether you have it.
Manufactured and mobile homes make up 22% of the housing here. Water lines in the underbelly depend on intact skirting and working heat tape, and they're usually the first to freeze in a cold snap.
With 18% of homes empty at survey time, landlords and seasonal owners should shut off the main or schedule checks in winter. An unheated vacant house is also where many policies limit freeze coverage.
Beyond water
Summer nights that don't drop below 65°F, a good marker of humid air, come about 64 times a year here, below the Tennessee county median of 74. 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 expectBy main heating fuel, Polk County homes break down as 2% utility gas, 71% electric, 19% propane and 5% wood. Wood and propane heat are above the Tennessee 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 Polk County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Polk gets more pipe-freeze nights than any of its neighbors. McMinn County has the oldest housing nearby, with 46% of homes built before 1980.
By the numbers
| Factor | Polk | Tennessee median | Rank |
|---|---|---|---|
| Homes built before 1960 | 16% | 16% | 57 of 95 |
| Homes built before 1980 | 40% | 41% | 56 of 95 |
| Homes built 2000 or later | 28% | 27% | 44 of 95 |
| Manufactured or mobile homes | 22% | 16% | 23 of 95 |
| Vacant homes | 18% | 12% | 13 of 95 |
| Wood or propane heat | 23% | 7.8% | 6 of 95 |
| Nights at 20°F or colder | 8/yr | 11/yr | 81 of 95 |
| Days with 1 inch+ of rain | 13/yr | 14/yr | 70 of 95 |
| Freeze-thaw days | 63/yr | 60/yr | 36 of 95 |
| Muggy nights (65°F+) | 64/yr | 74/yr | 67 of 95 |
Rank 1 is the highest value. Bars run from the lowest to the highest Tennessee county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Polk County: freezing from December to February, heavy rain in February, March and December.
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