Tom Green County, Texas · San Angelo
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Tom Green County averages 4 nights a year at 20°F or colder, mostly January, and 23% of its homes predate 1960.
Heavy rain days of an inch or more come about 4.7 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 Tom Green County gets about 4.7 days a year, when storm water overloads sewer mains and pushes up through the lowest drain in the house.
In Tom Green County, 3.02 inches fell on the wettest day of the 2015–2024 record. Storms like that, and ice dams in snowy winters, cause most roof leaks.
4% of occupied homes in Tom Green County heat mainly with wood or propane, below the Texas county median of 6.5%.
About 119 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 119,577 people live in Tom Green County, 1,522 square miles in central Texas, in roughly 52,318 homes. The county seat is San Angelo, and Grape Creek, Carlsbad and Christoval round out the largest towns. Half the homes here were built before 1980, half after.
49/100 Water Damage Risk Index: Elevated Tom Green County ranks 134 of 232 Texas counties. See the statewide ranking and method.The three factors where Tom Green County ranks highest compared with other Texas counties.
Tom Green County gets more hard-freeze nights than most of Texas. In the 2015–2024 record the county logged about 4 nights a year at or below 20°F (68th of 232) and 41 below freezing. Twenty degrees is roughly where uninsulated pipes start to freeze.
On February 15, 2021 the low fell to about 2°F, and in the stretch ending February 2021 the county went 8 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 January. That's when an outdoor spigot left connected to a hose, or a pipe in a crawl space, is most likely to split.
Freezing nights typically start around Nov 14 and end around Mar 4.
Tom Green gets fewer downpours than most Texas counties, but they still fill basements. The county gets about 23.1 inches of rain and melted snow a year, with 4.7 days of an inch or more (177th of 232). Those downpours cluster in May, September and October, when sump pumps and gutters are tested hardest. The wettest day on record brought 3.02 inches on September 3, 2024. The worst three-day stretch dropped 5.39 inches, ending September 11, 2020, the kind of soaking that overwhelms sump pumps and storm sewers.
About 39 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
50% of homes in Tom Green County predate 1980, above the Texas county median of 45.8%, which ranks 97th of Texas's 232 counties.
Older and newer homes sit side by side here: 23% predate 1960 and 22% are from 2000 or later. Corroded pipe is the typical failure in the first group, burst supply hoses in the second.
The 1980s and 1990s account for 28% of the county's homes. If yours is from those decades, look under the sinks and at the water heater for gray plastic pipe stamped PB, which is polybutylene and leak-prone.
Renters occupy 35% of homes. If you rent, the building is usually the landlord's to repair, but your belongings are only covered by renters insurance.
Beyond water
About 119 nights a year in Tom Green County stay at 65°F or warmer, a sign of muggy summer air (149th of 232 counties). May is the wettest month. The EPA recommends keeping indoor humidity below 60%, ideally 30 to 50%. Basements can pass 60% on their own in summer, so a dehumidifier matters even without a leak, and anything wet should be dried within 24 to 48 hours.
Mold remediation: what to expectHeating fuel matters for fire risk. In Tom Green County it's 30% utility gas, 65% electric, 3% propane and under 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 Tom Green County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Runnels gets more pipe-freeze nights than Tom Green. Runnels County has the oldest housing nearby, with 76% of homes built before 1980.
By the numbers
| Factor | Tom Green | Texas median | Rank |
|---|---|---|---|
| Homes built before 1960 | 23% | 20% | 94 of 232 |
| Homes built before 1980 | 50% | 46% | 97 of 232 |
| Homes built 2000 or later | 22% | 26% | 150 of 232 |
| Manufactured or mobile homes | 5.1% | 13% | 208 of 232 |
| Vacant homes | 11% | 17% | 182 of 232 |
| Wood or propane heat | 3.7% | 6.5% | 177 of 232 |
| Nights at 20°F or colder | 4/yr | 3/yr | 68 of 232 |
| Days with 1 inch+ of rain | 4.7/yr | 7.8/yr | 177 of 232 |
| Freeze-thaw days | 39/yr | 27/yr | 64 of 232 |
| Muggy nights (65°F+) | 119/yr | 129/yr | 149 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 Tom Green County: freezing from January, heavy rain in May, September 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