Jefferson County, Indiana · Madison
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With 32% of homes built before 1960 and about 23 hard-freeze nights a year, frozen and split pipes are a leading winter risk in the county.
February brings the most downpours to Jefferson County, part of 9.4 heavy-rain days a year. Check the sump first.
32% 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.
Jefferson County's wettest day in the 2015–2024 record brought 3.18 inches, and about 74 freeze-thaw days a year mean ice dams in some winters.
10% of occupied homes in Jefferson County heat mainly with wood or propane, below the Indiana county median of 17%.
With 58 muggy nights a year, mold in Jefferson County can appear within days of a leak. Dry first, then clean.
Local risk profile
With 14,517 homes and around 32,998 residents, Jefferson County is 361 square miles of southeast Indiana. Besides Madison, the county seat, the biggest communities are Hanover, Dupont and Canaan. Half the homes here were built before 1973, half after.
46/100 Water Damage Risk Index: Elevated Jefferson County ranks 61 of 92 Indiana counties. See the statewide ranking and method.The three factors where Jefferson County ranks highest compared with other Indiana counties.
Winters here are on the gentler end for Indiana, and pipes still freeze. It averaged 86 freezing nights a year over 2015–2024, 23 of them at 20°F or colder, cold enough for pipes in outside walls and crawl spaces to freeze. Among 92 Indiana counties that's 82nd.
The longest cold spell was straight 13 days without the temperature rising above freezing, ending in January 2018. The coldest night reached about -13°F on February 21, 2015. Burst pipes usually show up when a spell like that breaks and the ice thaws.
Expect the hardest freezes in January, inside a season that runs December 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 Oct 31 and end around Apr 12.
Heavy rain is a bigger factor here than in most of Indiana. The county gets about 51 inches of rain and melted snow a year, with 9.4 days of an inch or more (29th of 92). Those downpours cluster in February, March and July, when sump pumps and gutters are tested hardest. The wettest day on record brought 3.18 inches on July 14, 2015. The worst three-day stretch dropped 4.75 inches, ending August 18, 2018, the kind of soaking that overwhelms sump pumps and storm sewers.
About 74 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
65% of homes in Jefferson County predate 1980, above the Indiana county median of 58.2%, which ranks 30th of Indiana's 92 counties.
Housing age is mixed: 32% of homes are pre-1960 and 14% are 2000 or newer. Ask any plumber which era your house is from and you'll know which failures to watch for.
Manufactured and mobile homes make up 11% 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 12% 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
Jefferson County averages 58 warm, muggy nights a year (lows of 65°F or more) and gets the most rain in July. 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 Jefferson County it's 24% utility gas, 64% electric, 6% 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 Jefferson County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Jennings, Ripley and Scott get more pipe-freeze nights than Jefferson. Its housing is the oldest in the area by share of homes built before 1980.
By the numbers
| Factor | Jefferson | Indiana median | Rank |
|---|---|---|---|
| Homes built before 1960 | 32% | 35% | 54 of 92 |
| Homes built before 1980 | 65% | 58% | 30 of 92 |
| Homes built 2000 or later | 14% | 18% | 67 of 92 |
| Manufactured or mobile homes | 11% | 6.4% | 20 of 92 |
| Vacant homes | 12% | 9.2% | 20 of 92 |
| Wood or propane heat | 9.7% | 17% | 67 of 92 |
| Nights at 20°F or colder | 23/yr | 33/yr | 82 of 92 |
| Days with 1 inch+ of rain | 9.4/yr | 7.8/yr | 29 of 92 |
| Freeze-thaw days | 74/yr | 84/yr | 84 of 92 |
| Muggy nights (65°F+) | 58/yr | 38/yr | 14 of 92 |
Rank 1 is the highest value. Bars run from the lowest to the highest Indiana county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Jefferson County: freezing from December to March, heavy rain in February, March 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