Dinwiddie County, Virginia · Dinwiddie
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With 13% of homes built before 1960 and about 10 hard-freeze nights a year, frozen and split pipes are a leading winter risk in the county.
June brings the most downpours to Dinwiddie County, part of 10 heavy-rain days a year. Check the sump first.
13% 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.
In Dinwiddie County, 4.31 inches fell on the wettest day of the 2015–2024 record. Storms like that, and ice dams in snowy winters, cause most roof leaks.
13% of occupied homes in Dinwiddie County heat mainly with wood or propane, above the Virginia county median of 11.9%.
About 82 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
Dinwiddie County covers 504 square miles of southeast Virginia, with about 28,191 residents and 11,982 homes. Dinwiddie is the county seat; McKenney is the next largest community. Much of its housing is recent, with a median build year of 1987.
40/100 Water Damage Risk Index: Moderate Dinwiddie County ranks 78 of 95 Virginia counties. See the statewide ranking and method.The three factors where Dinwiddie County ranks highest compared with other Virginia counties.
Dinwiddie County is milder than most of Virginia, but not mild enough to skip winterizing. It averaged 74 freezing nights a year over 2015–2024, 10 of them at 20°F or colder, cold enough for pipes in outside walls and crawl spaces to freeze. Among 95 Virginia counties that's 65th.
On January 7, 2018 the low fell to about -5°F, and in the stretch ending January 2017 the county went 3 days in a row below freezing. Leaks from split pipes typically appear the day the thaw arrives.
Expect the hardest freezes in January, inside a season that runs December to February. That's when an outdoor spigot left connected to a hose, or a pipe in a crawl space, is most likely to split.
On average the first fall freeze arrives around Nov 8 and the last spring freeze around Mar 29.
Rainfall is about average for Virginia. About 10 days a year bring an inch or more (46th of 95), most often in June, out of 48.7 inches of total precipitation. On August 4, 2020, 4.31 inches fell in a single day. Multi-day storms matter most for basements; the wettest three days on record here totaled 4.82 inches (through May 19, 2018).
The temperature crosses 32°F in both directions on roughly 72 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
Roughly 40% of the county's housing was built before 1980. That puts Dinwiddie near the middle of Virginia's 95 counties.
The mix runs from 13% built before 1960 to 27% 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 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.
Beyond water
About 82 nights a year in Dinwiddie County stay at 65°F or warmer, a sign of muggy summer air (22nd of 95 counties). July is the wettest month. 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 expectBy main heating fuel, Dinwiddie County homes break down as 4% utility gas, 78% electric, 10% propane and 3% 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 Dinwiddie County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Amelia and Nottoway get more pipe-freeze nights than Dinwiddie. Nottoway County has the oldest housing nearby, with 58% of homes built before 1980.
By the numbers
| Factor | Dinwiddie | Virginia median | Rank |
|---|---|---|---|
| Homes built before 1960 | 13% | 20% | 72 of 95 |
| Homes built before 1980 | 40% | 46% | 59 of 95 |
| Homes built 2000 or later | 27% | 25% | 44 of 95 |
| Manufactured or mobile homes | 11% | 9.6% | 44 of 95 |
| Vacant homes | 11% | 15% | 59 of 95 |
| Wood or propane heat | 13% | 12% | 42 of 95 |
| Nights at 20°F or colder | 10/yr | 14/yr | 65 of 95 |
| Days with 1 inch+ of rain | 10/yr | 10/yr | 46 of 95 |
| Freeze-thaw days | 72/yr | 77/yr | 62 of 95 |
| Muggy nights (65°F+) | 82/yr | 64/yr | 22 of 95 |
Rank 1 is the highest value. Bars run from the lowest to the highest Virginia county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Dinwiddie County: freezing from December to February, heavy rain in June, 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