Grayson County, Virginia · Independence
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Grayson County averages 24 nights a year at 20°F or colder, mostly November to March, and 32% of its homes predate 1960.
Basements flood here mostly in October. Grayson County averages 10.3 days a year with an inch of rain or more.
Backups often follow heavy rain, which Grayson County gets about 10.3 days a year, when storm water overloads sewer mains and pushes up through the lowest drain in the house.
Roof leaks here come from summer downpours and, with about 94 freeze-thaw days a year, from winter ice dams. Most show up as ceiling stains in the room below.
25% of occupied homes in Grayson County heat mainly with wood or propane, above the Virginia county median of 11.9%.
About 2 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
With 8,961 homes and around 15,287 residents, Grayson County is 442 square miles of southwest Virginia. Besides Independence, the county seat, the biggest communities are Baywood, Fries and Hilltown. The county's median home was built in 1975.
69/100 Water Damage Risk Index: Elevated Grayson County ranks 1 of 95 Virginia counties. See the statewide ranking and method.The three factors where Grayson County ranks highest compared with other Virginia counties.
Grayson is on the colder side of Virginia for pipes. It averaged 107 freezing nights a year over 2015–2024, 24 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 7th.
On February 20, 2015 the low fell to about -6°F, and in the stretch ending January 2018 the county went 9 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 November 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.
On average the first fall freeze arrives around Oct 21 and the last spring freeze around Apr 24.
Rainfall is about average for Virginia. The county gets about 53 inches of rain and melted snow a year, with 10.3 days of an inch or more (38th of 95). Those downpours cluster in April, May and October, when sump pumps and gutters are tested hardest. The wettest day on record brought 3.31 inches on September 17, 2018. Multi-day storms matter most for basements; the wettest three days on record here totaled 7.77 inches (through September 28, 2024).
About 94 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 58% of the county's housing was built before 1980. That puts Grayson among the oldest housing stocks of Virginia's 95 counties.
32% were built before 1960. Homes from that era often still have galvanized steel supply pipe, which rusts from the inside until it pinholes, and cast iron drains that crack with age. Slow leaks behind walls are a common start to water damage in these houses.
About 28% 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 18% 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.
29% of homes were vacant at survey time. A leak in an empty rental or seasonal house can run for days before anyone notices, which is why those losses tend to be larger.
Beyond water
About 2 nights a year in Grayson County stay at 65°F or warmer, a sign of muggy summer air (94th of 95 counties). May 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 expectHeating fuel matters for fire risk. In Grayson County it's 1% utility gas, 50% electric, 12% propane and 14% wood. Wood and propane heat are more common here than in most Virginia counties. Heating equipment is one of the leading causes of home fires nationally, and the NFPA recommends having chimneys and vents inspected every year.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Grayson County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Grayson gets more pipe-freeze nights than any of its neighbors. Smyth County has the oldest housing nearby, with 62% of homes built before 1980.
By the numbers
| Factor | Grayson | Virginia median | Rank |
|---|---|---|---|
| Homes built before 1960 | 32% | 20% | 11 of 95 |
| Homes built before 1980 | 58% | 46% | 13 of 95 |
| Homes built 2000 or later | 14% | 25% | 91 of 95 |
| Manufactured or mobile homes | 18% | 9.6% | 28 of 95 |
| Vacant homes | 29% | 15% | 8 of 95 |
| Wood or propane heat | 25% | 12% | 9 of 95 |
| Nights at 20°F or colder | 24/yr | 14/yr | 7 of 95 |
| Days with 1 inch+ of rain | 10/yr | 10/yr | 38 of 95 |
| Freeze-thaw days | 94/yr | 77/yr | 6 of 95 |
| Muggy nights (65°F+) | 2/yr | 64/yr | 94 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 Grayson County: freezing from November to March, heavy rain in April, May 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