Isle of Wight County, Virginia · Isle of Wight
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Isle of Wight County averages 5 nights a year at 20°F or colder, mostly December to January, and 12% of its homes predate 1960.
September brings the most downpours to Isle of Wight County, part of 11.2 heavy-rain days a year. Check the sump first.
12% 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 Isle of Wight County, 5.91 inches fell on the wettest day of the 2015–2024 record. Storms like that, and ice dams in snowy winters, cause most roof leaks.
11% of occupied homes in Isle of Wight County heat mainly with wood or propane, below the Virginia county median of 11.9%.
About 94 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
About 39,974 people live in Isle of Wight County, 316 square miles in southeast Virginia, in roughly 17,125 homes. Isle of Wight is the county seat; Smithfield, Carrollton and Windsor are the next largest communities. Much of its housing is recent, with a median build year of 1993.
41/100 Water Damage Risk Index: Moderate Isle of Wight County ranks 76 of 95 Virginia counties. See the statewide ranking and method.The three factors where Isle of Wight County ranks highest compared with other Virginia counties.
Isle of Wight County is milder than most of Virginia, but not mild enough to skip winterizing. In the 2015–2024 record the county logged about 5 nights a year at or below 20°F (93rd of 95) and 53 below freezing. Twenty degrees is roughly where uninsulated pipes start to freeze.
On January 7, 2018 the low fell to about 3°F, and in the stretch ending February 2015 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 January. 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 18 and the last spring freeze around Mar 24.
Heavy rain is a bigger factor here than in most of Virginia. The county gets about 52 inches of rain and melted snow a year, with 11.2 days of an inch or more (15th of 95). Those downpours cluster in July, August and September, when sump pumps and gutters are tested hardest. The wettest day on record brought 5.91 inches on October 9, 2016. Multi-day storms matter most for basements; the wettest three days on record here totaled 7.11 inches (through October 10, 2016).
Freeze-thaw days, below freezing overnight and above it by afternoon, come about 51 times a year here. They're the main driver of ice dams and of water working its way through foundation cracks in late winter.
Housing
Virginia's 95 counties range widely in housing age; Isle of Wight ranks 75th, with 31% of its homes built before 1980.
Growth since 2000 added 38% of today's homes. In houses that new, the weak points are washing machine hoses, ice maker lines, water heaters and sump pumps rather than the pipes in the walls.
About 31% 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 9% 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
Isle of Wight County averages 94 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 Isle of Wight County it's 25% utility gas, 62% electric, 10% propane and 1% wood. Heating equipment, cooking and electrical failures cause most home fires nationally. Even a small kitchen fire can leave soot through the whole house, because smoke follows air currents into closets, ducts and attic space.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Isle of Wight County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Every neighboring county gets more pipe-freeze nights than Isle of Wight. Southampton County has the oldest housing nearby, with 49% of homes built before 1980.
By the numbers
| Factor | Isle of Wight | Virginia median | Rank |
|---|---|---|---|
| Homes built before 1960 | 12% | 20% | 74 of 95 |
| Homes built before 1980 | 31% | 46% | 75 of 95 |
| Homes built 2000 or later | 38% | 25% | 17 of 95 |
| Manufactured or mobile homes | 8.6% | 9.6% | 55 of 95 |
| Vacant homes | 8% | 15% | 70 of 95 |
| Wood or propane heat | 11% | 12% | 56 of 95 |
| Nights at 20°F or colder | 5/yr | 14/yr | 93 of 95 |
| Days with 1 inch+ of rain | 11/yr | 10/yr | 15 of 95 |
| Freeze-thaw days | 51/yr | 77/yr | 92 of 95 |
| Muggy nights (65°F+) | 94/yr | 64/yr | 10 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 Isle of Wight County: freezing from December to January, heavy rain in July, August and September.
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