Durham County, North Carolina · Durham
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Pipes freeze in Durham County on about 7 nights a year, mostly December to February. Older homes, 14% of the stock here, are most at risk.
Basements flood here mostly in September. Durham County averages 11.1 days a year with an inch of rain or more.
Sewage backups in Durham County spike on heavy-rain days, about 11.1 a year, when sewer mains fill up and water finds the lowest drain.
Durham County's wettest day in the 2015–2024 record brought 3.75 inches, and about 65 freeze-thaw days a year mean ice dams in some winters.
2% of occupied homes in Durham County heat mainly with wood or propane, below the North Carolina county median of 11.7%.
With 80 muggy nights a year, mold in Durham County can appear within days of a leak. Dry first, then clean.
Local risk profile
With 153,022 homes and around 332,353 residents, Durham County is 288 square miles of northern North Carolina. Besides Durham, the county seat, the biggest communities are Gorman and Rougemont. Much of its housing is recent, with a median build year of 1993.
43/100 Water Damage Risk Index: Moderate Durham County ranks 72 of 100 North Carolina counties. See the statewide ranking and method.The three factors where Durham County ranks highest compared with other North Carolina counties.
For frozen pipes, Durham County is a typical North Carolina county, which is still plenty. In the 2015–2024 record the county logged about 7 nights a year at or below 20°F (35th of 100) and 67 below freezing. Twenty degrees is roughly where uninsulated pipes start to freeze.
Cold snaps are the real risk. The worst in the record lasted 7 days below freezing (ending January 2018), and the low bottomed out near 4°F on January 7, 2018.
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.
On average the first fall freeze arrives around Nov 10 and the last spring freeze around Mar 26.
Rainfall is about average for North Carolina. Of roughly 50.5 inches of yearly precipitation, the damage comes from the 11.1 days a year with an inch or more, ranked 60th of 100. April, September and October see the most. The single wettest day in the record: 3.75 inches, October 9, 2016. Multi-day storms matter most for basements; the wettest three days on record here totaled 6.3 inches (through September 17, 2018).
The temperature crosses 32°F in both directions on roughly 65 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
North Carolina's 100 counties range widely in housing age; Durham ranks 78th, with 31% of its homes built before 1980.
Since 2000 the county has added enough housing that 41% of homes are that new. Modern PEX and copper rarely fail on their own; the leaks come from connections, appliances and storms.
The 1980s and 1990s account for 28% of the county's homes. If yours is from those decades, look under the sinks and at the water heater for gray plastic pipe stamped PB, which is polybutylene and leak-prone.
Renters occupy 45% of homes. If you rent, the building is usually the landlord's to repair, but your belongings are only covered by renters insurance.
Beyond water
Summer nights that don't drop below 65°F, a good marker of humid air, come about 80 times a year here, close to the North Carolina county median of 88.5. The EPA recommends keeping indoor humidity below 60%, ideally 30 to 50%. Basements can pass 60% on their own in summer, so a dehumidifier matters even without a leak, and anything wet should be dried within 24 to 48 hours.
Mold remediation: what to expectHeating fuel matters for fire risk. In Durham County it's 37% utility gas, 59% electric, 2% propane and under 1% wood. Most homes here heat with gas or electricity, so cooking and electrical faults are the likelier fire sources. Even a contained kitchen fire can send soot through the ductwork to every room.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Durham County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Granville and Person get more pipe-freeze nights than Durham. Person County has the oldest housing nearby, with 46% of homes built before 1980.
By the numbers
| Factor | Durham | North Carolina median | Rank |
|---|---|---|---|
| Homes built before 1960 | 14% | 18% | 69 of 100 |
| Homes built before 1980 | 31% | 41% | 78 of 100 |
| Homes built 2000 or later | 41% | 26% | 16 of 100 |
| Manufactured or mobile homes | 1.2% | 17% | 100 of 100 |
| Vacant homes | 7.3% | 13% | 94 of 100 |
| Wood or propane heat | 2.4% | 12% | 98 of 100 |
| Nights at 20°F or colder | 7/yr | 5/yr | 35 of 100 |
| Days with 1 inch+ of rain | 11/yr | 12/yr | 60 of 100 |
| Freeze-thaw days | 65/yr | 57/yr | 33 of 100 |
| Muggy nights (65°F+) | 80/yr | 89/yr | 60 of 100 |
Rank 1 is the highest value. Bars run from the lowest to the highest North Carolina county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Durham County: freezing from December to February, heavy rain in April, September 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