Rockbridge County, Virginia · Lexington
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Rockbridge County averages 18 nights a year at 20°F or colder, mostly November to March, and 28% of its homes predate 1960.
Heavy rain days of an inch or more come about 10.2 times a year here, most often in September. A sump pump that hasn't run since last season is a common weak point.
Backups often follow heavy rain, which Rockbridge County gets about 10.2 days a year, when storm water overloads sewer mains and pushes up through the lowest drain in the house.
In Rockbridge County, 4.18 inches fell on the wettest day of the 2015–2024 record. Storms like that, and ice dams in snowy winters, cause most roof leaks.
29% of occupied homes in Rockbridge County heat mainly with wood or propane, above the Virginia county median of 11.9%.
With 38 muggy nights a year, mold in Rockbridge County can appear within days of a leak. Dry first, then clean.
Local risk profile
About 22,531 people live in Rockbridge County, 597 square miles in central Virginia, in roughly 11,361 homes. The county seat is Lexington, and East Lexington, Glasgow and Fairfield round out the largest towns. Half the homes here were built before 1980, half after.
64/100 Water Damage Risk Index: Elevated Rockbridge County ranks 8 of 95 Virginia counties. See the statewide ranking and method.The three factors where Rockbridge County ranks highest compared with other Virginia counties.
Rockbridge County gets more hard-freeze nights than most of Virginia. From 2015–2024 it averaged 18 nights a year at 20°F or colder, the range where pipes in exterior walls, crawl spaces and unheated garages freeze, and 89 nights at or below 32°F. That ranks 28th of 95 counties.
The longest cold spell was straight 8 days without the temperature rising above freezing, ending in January 2018. The coldest night reached about -2°F on February 20, 2015. Burst pipes usually show up when a spell like that breaks and the ice thaws.
Most freezing nights fall from November to March, peaking in January. Disconnect garden hoses and shut off outdoor spigots before the first hard frost, and keep the heat at 55°F or higher if you'll be away.
Freezing nights typically start around Nov 3 and end around Apr 14.
Rainfall is about average for Virginia. About 10.2 days a year bring an inch or more (41st of 95), most often in September, out of 46.8 inches of total precipitation. On August 9, 2024, 4.18 inches fell in a single day. The worst three-day stretch dropped 4.86 inches, ending September 23, 2021, the kind of soaking that overwhelms sump pumps and storm sewers.
The temperature crosses 32°F in both directions on roughly 80 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 50% of the county's housing was built before 1980. That puts Rockbridge among the oldest housing stocks of Virginia's 95 counties.
In Rockbridge County 28% of homes are older than 1960. If yours is one of them and the plumbing has never been replaced, expect galvanized steel supply pipe and cast iron drain lines, the two materials most likely to fail quietly.
29% date from 1980 to 1999, the window when polybutylene, a gray flexible plastic supply pipe, was used in some homes. It's prone to leaks at the fittings, so it's worth checking for in a house from those years.
11% of homes are manufactured or mobile homes, close to the Virginia county median of 9.6%. Their water lines run under the floor behind the skirting, so a torn skirt or failed heat tape freezes them faster than lines in a site-built house.
Beyond water
Rockbridge County averages 38 warm, muggy nights a year (lows of 65°F or more) and gets the most rain in September. 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, Rockbridge County homes break down as 6% utility gas, 54% electric, 14% propane and 15% wood. Wood and propane heat are more common here than the state median. Have chimneys swept and fuel-burning appliances serviced each fall, and keep three feet clear around stoves and space heaters.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Rockbridge County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Alleghany, Augusta and Bath get more pipe-freeze nights than Rockbridge. Alleghany County has the oldest housing nearby, with 64% of homes built before 1980.
By the numbers
| Factor | Rockbridge | Virginia median | Rank |
|---|---|---|---|
| Homes built before 1960 | 28% | 20% | 18 of 95 |
| Homes built before 1980 | 50% | 46% | 30 of 95 |
| Homes built 2000 or later | 22% | 25% | 64 of 95 |
| Manufactured or mobile homes | 11% | 9.6% | 46 of 95 |
| Vacant homes | 16% | 15% | 44 of 95 |
| Wood or propane heat | 29% | 12% | 4 of 95 |
| Nights at 20°F or colder | 18/yr | 14/yr | 28 of 95 |
| Days with 1 inch+ of rain | 10/yr | 10/yr | 41 of 95 |
| Freeze-thaw days | 80/yr | 77/yr | 34 of 95 |
| Muggy nights (65°F+) | 38/yr | 64/yr | 68 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 Rockbridge County: freezing from November to March, heavy rain in September, October and November.
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