Lancaster County, Nebraska · Lincoln
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Lancaster County averages 52 nights a year at 20°F or colder, mostly November to March, and 24% of its homes predate 1960.
May brings the most downpours to Lancaster County, part of 7.4 heavy-rain days a year. Check the sump first.
24% 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 Lancaster County, 3.78 inches fell on the wettest day of the 2015–2024 record. Storms like that, and ice dams in snowy winters, cause most roof leaks.
3% of occupied homes in Lancaster County heat mainly with wood or propane, below the Nebraska county median of 19.4%.
With 44 muggy nights a year, mold in Lancaster County can appear within days of a leak. Dry first, then clean.
Local risk profile
Lancaster County covers 838 square miles of southeast Nebraska, with about 326,696 residents and 140,324 homes. Besides Lincoln, the county seat, the biggest communities are Waverly, Hickman and Bennet. The county's median home was built in 1983.
42/100 Water Damage Risk Index: Moderate Lancaster County ranks 77 of 93 Nebraska counties. See the statewide ranking and method.The three factors where Lancaster County ranks highest compared with other Nebraska counties.
Lancaster County is milder than most of Nebraska, but not mild enough to skip winterizing. It averaged 132 freezing nights a year over 2015–2024, 52 of them at 20°F or colder, cold enough for pipes in outside walls and crawl spaces to freeze. Among 93 Nebraska counties that's 78th.
Cold snaps are the real risk. The worst in the record lasted 16 days below freezing (ending January 2018), and the low bottomed out near -27°F on February 16, 2021.
Expect the hardest freezes in January, inside a season that runs November to March. 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 20 and the last spring freeze around Apr 20.
Heavy rain is a bigger factor here than in most of Nebraska. The county gets about 31.5 inches of rain and melted snow a year, with 7.4 days of an inch or more (5th of 93). Those downpours cluster in May, June and July, when sump pumps and gutters are tested hardest. The wettest day on record brought 3.78 inches on May 7, 2015. Multi-day storms matter most for basements; the wettest three days on record here totaled 4.4 inches (through May 7, 2015).
The temperature crosses 32°F in both directions on roughly 98 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
47% of homes in Lancaster County predate 1980, below the Nebraska county median of 73.1%, which ranks 91st of Nebraska's 93 counties.
Since 2000 the county has added enough housing that 29% 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 24% 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 41% 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
Lancaster County averages 44 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 expectBy main heating fuel, Lancaster County homes break down as 61% utility gas, 36% 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 Lancaster County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Butler, Saline and Seward get more pipe-freeze nights than Lancaster. Saline County has the oldest housing nearby, with 75% of homes built before 1980.
By the numbers
| Factor | Lancaster | Nebraska median | Rank |
|---|---|---|---|
| Homes built before 1960 | 24% | 49% | 91 of 93 |
| Homes built before 1980 | 47% | 73% | 91 of 93 |
| Homes built 2000 or later | 29% | 12% | 2 of 93 |
| Manufactured or mobile homes | 1.4% | 5% | 86 of 93 |
| Vacant homes | 4.4% | 14% | 90 of 93 |
| Wood or propane heat | 3.4% | 19% | 91 of 93 |
| Nights at 20°F or colder | 52/yr | 64/yr | 78 of 93 |
| Days with 1 inch+ of rain | 7.4/yr | 5.1/yr | 5 of 93 |
| Freeze-thaw days | 98/yr | 112/yr | 83 of 93 |
| Muggy nights (65°F+) | 44/yr | 27/yr | 13 of 93 |
Rank 1 is the highest value. Bars run from the lowest to the highest Nebraska county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Lancaster County: freezing from November to March, heavy rain in May, June and July.
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