Wilson County, Texas · Floresville
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Pipes freeze in Wilson County on about 1 night a year, mostly midwinter. Older homes, 6% of the stock here, are most at risk.
Basements flood here mostly in May. Wilson County averages 8 days a year with an inch of rain or more.
Sewage backups in Wilson County spike on heavy-rain days, about 8 a year, when sewer mains fill up and water finds the lowest drain.
Roof leaks here come from summer downpours. Most show up as ceiling stains in the room below.
7% of occupied homes in Wilson County heat mainly with wood or propane, close to the Texas county median of 6.5%.
About 168 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
Wilson County covers 804 square miles of southern Texas, with about 52,781 residents and 19,480 homes. Floresville is the county seat; Poth, Stockdale and La Vernia are the next largest communities. Much of its housing is recent, with a median build year of 2000.
33/100 Water Damage Risk Index: Moderate Wilson County ranks 222 of 232 Texas counties. See the statewide ranking and method.The three factors where Wilson County ranks highest compared with other Texas counties.
Winters here are on the gentler end for Texas, and pipes still freeze. In the 2015–2024 record the county logged about 1 night a year at or below 20°F (159th of 232) and 9 below freezing. Twenty degrees is roughly where uninsulated pipes start to freeze.
On February 15, 2021 the low fell to about 13°F, and in the stretch ending February 2021 the county went 3 days in a row below freezing. Leaks from split pipes typically appear the day the thaw arrives.
Hard freezes are uncommon here, about 9 nights a year at or below 32°F, and that's exactly why they do damage: pipes in attics, exterior walls and slab-edge plumbing are rarely insulated. The coldest night in the record was about 13°F on February 15, 2021.
Rainfall is about average for Texas. About 8 days a year bring an inch or more (110th of 232), most often in May, out of 30.7 inches of total precipitation. On August 27, 2017, 4.08 inches fell in a single day. The worst three-day stretch dropped 7.48 inches, ending August 28, 2017, the kind of soaking that overwhelms sump pumps and storm sewers.
Housing
Texas's 232 counties range widely in housing age; Wilson ranks 225th, with 17% of its homes built before 1980.
49% of homes were built in 2000 or later, more than in most of Texas. Newer plumbing rarely corrodes, so damage here tends to come from appliance supply lines, water heaters, sump pumps and storms.
About 34% 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.
Here 26% 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.
Beyond water
Wilson County averages 168 warm, muggy nights a year (lows of 65°F or more) and gets the most rain in May. 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 Wilson County it's 7% utility gas, 85% electric, 6% propane and under 1% wood. Fires here are likelier to start in the kitchen or the wiring than in the furnace. After any fire, keep the HVAC off until ducts are checked, or soot will travel through the house.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Wilson County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Wilson gets more pipe-freeze nights than any of its neighbors. Gonzales County has the oldest housing nearby, with 46% of homes built before 1980.
By the numbers
| Factor | Wilson | Texas median | Rank |
|---|---|---|---|
| Homes built before 1960 | 5.9% | 20% | 219 of 232 |
| Homes built before 1980 | 17% | 46% | 225 of 232 |
| Homes built 2000 or later | 49% | 26% | 15 of 232 |
| Manufactured or mobile homes | 26% | 13% | 17 of 232 |
| Vacant homes | 6.6% | 17% | 218 of 232 |
| Wood or propane heat | 7% | 6.5% | 111 of 232 |
| Nights at 20°F or colder | 1/yr | 3/yr | 159 of 232 |
| Days with 1 inch+ of rain | 8/yr | 7.8/yr | 110 of 232 |
| Freeze-thaw days | 9/yr | 27/yr | 186 of 232 |
| Muggy nights (65°F+) | 168/yr | 129/yr | 41 of 232 |
Rank 1 is the highest value. Bars run from the lowest to the highest Texas county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Wilson County: freezing from midwinter, heavy rain in April, May 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