Monroe County, West Virginia · Union
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Monroe County averages 26 nights a year at 20°F or colder, mostly November to March, and 26% of its homes predate 1960.
Heavy rain days of an inch or more come about 7.9 times a year here, most often in April. A sump pump that hasn't run since last season is a common weak point.
Backups often follow heavy rain, which Monroe County gets about 7.9 days a year, when storm water overloads sewer mains and pushes up through the lowest drain in the house.
In Monroe County, 3.47 inches fell on the wettest day of the 2015–2024 record. Storms like that, and ice dams in snowy winters, cause most roof leaks.
28% of occupied homes in Monroe County heat mainly with wood or propane, above the West Virginia county median of 10.1%.
About 13 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
Monroe County covers 473 square miles of southern West Virginia, with about 12,386 residents and 6,240 homes. Union is the county seat; Peterstown is the next largest community. Half the homes here were built before 1978, half after.
51/100 Water Damage Risk Index: Elevated Monroe County ranks 26 of 55 West Virginia counties. See the statewide ranking and method.The three factors where Monroe County ranks highest compared with other West Virginia counties.
Pipe-freeze risk in Monroe County sits near the middle of the state. In the 2015–2024 record the county logged about 26 nights a year at or below 20°F (23rd of 55) and 102 below freezing. Twenty degrees is roughly where uninsulated pipes start to freeze.
The longest cold spell was straight 14 days without the temperature rising above freezing, ending in January 2018. The coldest night reached about -6°F on February 21, 2015. Burst pipes usually show up when a spell like that breaks and the ice thaws.
The freeze season here runs November to March, with January the coldest. If you travel then, leave the thermostat at 55°F or above and open sink cabinets on outside walls.
Freezing nights typically start around Oct 24 and end around Apr 21.
Heavy rain is a bigger factor here than in most of West Virginia. Of roughly 45.9 inches of yearly precipitation, the damage comes from the 7.9 days a year with an inch or more, ranked 8th of 55. February, April and May see the most. The single wettest day in the record: 3.47 inches, June 24, 2016. The worst three-day stretch dropped 4.44 inches, ending June 24, 2016, the kind of soaking that overwhelms sump pumps and storm sewers.
The temperature crosses 32°F in both directions on roughly 90 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 54% of the county's housing was built before 1980. That puts Monroe near the middle of West Virginia's 55 counties.
The mix runs from 26% built before 1960 to 17% built since 2000, so older neighborhoods bring aging pipe while newer subdivisions bring failed appliance lines and water heaters.
30% 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.
Here 15% of housing is manufactured homes. Check the skirting and the heat tape on the main water line every fall, because that one exposed line is what freezes.
26% 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
Summer nights that don't drop below 65°F, a good marker of humid air, come about 13 times a year here, below the West Virginia county median of 27. Mold grows when indoor humidity stays above about 60%, the EPA's ceiling. A basement dehumidifier set to 50% and drying anything wet within 24 to 48 hours prevents most problems.
Mold remediation: what to expectHeating fuel matters for fire risk. In Monroe County it's 11% utility gas, 56% electric, 13% propane and 15% wood. Wood and propane heat are above the West Virginia norm. Annual chimney and vent inspection, which the NFPA recommends, is one of the most effective fire-prevention habits for these homes.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Monroe County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Greenbrier gets more pipe-freeze nights than Monroe. Summers County has the oldest housing nearby, with 62% of homes built before 1980.
By the numbers
| Factor | Monroe | West Virginia median | Rank |
|---|---|---|---|
| Homes built before 1960 | 26% | 31% | 37 of 55 |
| Homes built before 1980 | 54% | 55% | 34 of 55 |
| Homes built 2000 or later | 17% | 17% | 29 of 55 |
| Manufactured or mobile homes | 15% | 16% | 32 of 55 |
| Vacant homes | 26% | 17% | 10 of 55 |
| Wood or propane heat | 28% | 10% | 9 of 55 |
| Nights at 20°F or colder | 26/yr | 25/yr | 23 of 55 |
| Days with 1 inch+ of rain | 7.9/yr | 6.8/yr | 8 of 55 |
| Freeze-thaw days | 90/yr | 89/yr | 18 of 55 |
| Muggy nights (65°F+) | 13/yr | 27/yr | 44 of 55 |
Rank 1 is the highest value. Bars run from the lowest to the highest West Virginia county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Monroe County: freezing from November to March, heavy rain in February, April and May.
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