Grady County, Oklahoma · Chickasha
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Grady County averages 12 nights a year at 20°F or colder, mostly December to February, and 23% of its homes predate 1960.
Heavy rain days of an inch or more come about 9.9 times a year here, most often in May. A sump pump that hasn't run since last season is a common weak point.
23% of homes here predate 1960, when clay and cast iron sewer laterals were standard. Roots and cracks in those lines are a common cause of backups.
In Grady County, 3.49 inches fell on the wettest day of the 2015–2024 record. Storms like that, and ice dams in snowy winters, cause most roof leaks.
14% of occupied homes in Grady County heat mainly with wood or propane, close to the Oklahoma county median of 12.5%.
About 101 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
Grady County covers 1,101 square miles of central Oklahoma, with about 56,606 residents and 23,528 homes. Besides Chickasha, the county seat, the biggest communities are Blanchard, Tuttle and Minco. The county's median home was built in 1982.
45/100 Water Damage Risk Index: Elevated Grady County ranks 53 of 77 Oklahoma counties. See the statewide ranking and method.The three factors where Grady County ranks highest compared with other Oklahoma counties.
For frozen pipes, Grady County is a typical Oklahoma county, which is still plenty. From 2015–2024 it averaged 12 nights a year at 20°F or colder, the range where pipes in exterior walls, crawl spaces and unheated garages freeze, and 66 nights at or below 32°F. That ranks 41st of 77 counties.
On February 17, 2021 the low fell to about -7°F, and in the stretch ending February 2021 the county went 10 days in a row below freezing. Leaks from split pipes typically appear the day the thaw arrives.
Most freezing nights fall from December to February, 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.
On average the first fall freeze arrives around Nov 6 and the last spring freeze around Mar 30.
Rainfall is about average for Oklahoma. Of roughly 36.5 inches of yearly precipitation, the damage comes from the 9.9 days a year with an inch or more, ranked 49th of 77. May, June and September see the most. The single wettest day in the record: 3.49 inches, May 24, 2015. Multi-day storms matter most for basements; the wettest three days on record here totaled 5.05 inches (through May 8, 2015).
The temperature crosses 32°F in both directions on roughly 61 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 47% of the county's housing was built before 1980. That puts Grady among the newer housing stocks of Oklahoma's 77 counties.
29% of homes were built in 2000 or later, more than in most of Oklahoma. Newer plumbing rarely corrodes, so damage here tends to come from appliance supply lines, water heaters, sump pumps and storms.
24% 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 12% 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
About 101 nights a year in Grady County stay at 65°F or warmer, a sign of muggy summer air (29th of 77 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 expectMain heating fuel in Grady County's occupied homes: 36% utility gas, 48% electric, 13% propane and 1% wood. Most homes here heat with gas or electricity, so cooking and electrical faults are the likelier fire sources. Even a contained kitchen fire can send soot through the ductwork to every room.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Grady County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Caddo and Canadian get more pipe-freeze nights than Grady. Caddo County has the oldest housing nearby, with 67% of homes built before 1980.
By the numbers
| Factor | Grady | Oklahoma median | Rank |
|---|---|---|---|
| Homes built before 1960 | 23% | 24% | 42 of 77 |
| Homes built before 1980 | 47% | 55% | 52 of 77 |
| Homes built 2000 or later | 29% | 22% | 14 of 77 |
| Manufactured or mobile homes | 12% | 12% | 43 of 77 |
| Vacant homes | 12% | 17% | 61 of 77 |
| Wood or propane heat | 14% | 13% | 34 of 77 |
| Nights at 20°F or colder | 12/yr | 13/yr | 41 of 77 |
| Days with 1 inch+ of rain | 9.9/yr | 11/yr | 49 of 77 |
| Freeze-thaw days | 61/yr | 65/yr | 46 of 77 |
| Muggy nights (65°F+) | 101/yr | 98/yr | 29 of 77 |
Rank 1 is the highest value. Bars run from the lowest to the highest Oklahoma county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Grady County: freezing from December to February, heavy rain in May, June 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