Montgomery County, Texas · Conroe
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Pipes freeze in Montgomery County on about 1 night a year, mostly midwinter. Older homes, 2% of the stock here, are most at risk.
May brings the most downpours to Montgomery County, part of 15.4 heavy-rain days a year. Check the sump first.
Sewage backups in Montgomery County spike on heavy-rain days, about 15.4 a year, when sewer mains fill up and water finds the lowest drain.
Montgomery County's wettest day in the 2015–2024 record brought 10.61 inches.
4% of occupied homes in Montgomery County heat mainly with wood or propane, below the Texas county median of 6.5%.
Muggy summer nights, lows of 65°F or more, come about 166 times a year in Montgomery County. Mold after a leak spreads fastest from June through August.
Local risk profile
Montgomery County covers 1,042 square miles of eastern Texas, with about 684,432 residents and 266,019 homes. Conroe is the county seat; The Woodlands, Willis and Pinehurst are the next largest communities. Much of its housing is recent, with a median build year of 2004.
41/100 Water Damage Risk Index: Moderate Montgomery County ranks 183 of 232 Texas counties. See the statewide ranking and method.The three factors where Montgomery County ranks highest compared with other Texas counties.
Montgomery County is milder than most of Texas, but not mild enough to skip winterizing. It averaged 9 freezing nights a year over 2015–2024, 1 of them at 20°F or colder, cold enough for pipes in outside walls and crawl spaces to freeze. Among 232 Texas counties that's 159th.
With only about 9 freezing nights a year, many homes here aren't built for cold, so a single arctic outbreak can burst pipes across the county. The record low in this data was about 10°F, on February 16, 2021.
Heavy rain is a bigger factor here than in most of Texas. The county gets about 55.9 inches of rain and melted snow a year, with 15.4 days of an inch or more (28th of 232). Those downpours cluster in April, May and December, when sump pumps and gutters are tested hardest. The wettest day on record brought 10.61 inches on August 27, 2017. Multi-day storms matter most for basements; the wettest three days on record here totaled 23.89 inches (through August 29, 2017).
Housing
Texas's 232 counties range widely in housing age; Montgomery ranks 226th, with 14% of its homes built before 1980.
60% 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.
The 1980s and 1990s account for 27% 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.
Manufactured and mobile homes make up 12% 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
Montgomery County averages 166 warm, muggy nights a year (lows of 65°F or more) and gets the most rain in May. 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 expectBy main heating fuel, Montgomery County homes break down as 43% utility gas, 52% electric, 4% 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 Montgomery County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Montgomery gets more pipe-freeze nights than any of its neighbors. Harris County has the oldest housing nearby, with 37% of homes built before 1980.
By the numbers
| Factor | Montgomery | Texas median | Rank |
|---|---|---|---|
| Homes built before 1960 | 1.7% | 20% | 231 of 232 |
| Homes built before 1980 | 14% | 46% | 226 of 232 |
| Homes built 2000 or later | 60% | 26% | 6 of 232 |
| Manufactured or mobile homes | 12% | 13% | 145 of 232 |
| Vacant homes | 6.9% | 17% | 217 of 232 |
| Wood or propane heat | 4.2% | 6.5% | 160 of 232 |
| Nights at 20°F or colder | 1/yr | 3/yr | 159 of 232 |
| Days with 1 inch+ of rain | 15/yr | 7.8/yr | 28 of 232 |
| Freeze-thaw days | 8/yr | 27/yr | 192 of 232 |
| Muggy nights (65°F+) | 166/yr | 129/yr | 47 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 Montgomery County: freezing from midwinter, heavy rain in April, May and December.
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