Douglas County, Kansas · Lawrence
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Douglas County averages 31 nights a year at 20°F or colder, mostly November to February, and 19% of its homes predate 1960.
May brings the most downpours to Douglas County, part of 8.9 heavy-rain days a year. Check the sump first.
19% 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 Douglas County, 4.82 inches fell on the wettest day of the 2015–2024 record. Storms like that, and ice dams in snowy winters, cause most roof leaks.
7% of occupied homes in Douglas County heat mainly with wood or propane, below the Kansas county median of 16.9%.
Muggy summer nights, lows of 65°F or more, come about 71 times a year in Douglas County. Mold after a leak spreads fastest from June through August.
Local risk profile
Douglas County covers 456 square miles of eastern Kansas, with about 120,302 residents and 53,675 homes. Besides Lawrence, the county seat, the biggest communities are Eudora, Baldwin City and Lecompton. Much of its housing is recent, with a median build year of 1988.
37/100 Water Damage Risk Index: Moderate Douglas County ranks 97 of 105 Kansas counties. See the statewide ranking and method.The three factors where Douglas County ranks highest compared with other Kansas counties.
Douglas County is milder than most of Kansas, but not mild enough to skip winterizing. It averaged 100 freezing nights a year over 2015–2024, 31 of them at 20°F or colder, cold enough for pipes in outside walls and crawl spaces to freeze. Among 105 Kansas counties that's 78th.
The longest cold spell was straight 14 days without the temperature rising above freezing, ending in January 2018. The coldest night reached about -15°F on February 16, 2021. Burst pipes usually show up when a spell like that breaks and the ice thaws.
Expect the hardest freezes in January, inside a season that runs November to February. That's when an outdoor spigot left connected to a hose, or a pipe in a crawl space, is most likely to split.
On average the first fall freeze arrives around Oct 31 and the last spring freeze around Apr 9.
Heavy rain is a bigger factor here than in most of Kansas. About 8.9 days a year bring an inch or more (28th of 105), most often in May, out of 39.1 inches of total precipitation. On August 22, 2017, 4.82 inches fell in a single day. Multi-day storms matter most for basements; the wettest three days on record here totaled 4.97 inches (through October 9, 2018).
About 82 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
40% of homes in Douglas County predate 1980, below the Kansas county median of 73.7%, which ranks 104th of Kansas's 105 counties.
Since 2000 the county has added enough housing that 31% of homes are that new. Modern PEX and copper rarely fail on their own; the leaks come from connections, appliances and storms.
The 1980s and 1990s account for 29% 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 50% 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
Douglas County averages 71 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 expectMain heating fuel in Douglas County's occupied homes: 59% utility gas, 34% 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 Douglas County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Jefferson, Leavenworth and Shawnee get more pipe-freeze nights than Douglas. Shawnee County has the oldest housing nearby, with 63% of homes built before 1980.
By the numbers
| Factor | Douglas | Kansas median | Rank |
|---|---|---|---|
| Homes built before 1960 | 19% | 48% | 104 of 105 |
| Homes built before 1980 | 40% | 74% | 104 of 105 |
| Homes built 2000 or later | 31% | 11% | 6 of 105 |
| Manufactured or mobile homes | 1.7% | 5.6% | 102 of 105 |
| Vacant homes | 6.1% | 15% | 101 of 105 |
| Wood or propane heat | 6.5% | 17% | 99 of 105 |
| Nights at 20°F or colder | 31/yr | 39/yr | 78 of 105 |
| Days with 1 inch+ of rain | 8.9/yr | 6.8/yr | 28 of 105 |
| Freeze-thaw days | 82/yr | 97/yr | 86 of 105 |
| Muggy nights (65°F+) | 71/yr | 59/yr | 29 of 105 |
Rank 1 is the highest value. Bars run from the lowest to the highest Kansas county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Douglas County: freezing from November to February, heavy rain in May, June and August.
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