Garden County, Nebraska · Oshkosh
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Garden County averages 77 nights a year at 20°F or colder, mostly November to April, and 59% of its homes predate 1960.
May brings the most downpours to Garden County, part of 2 heavy-rain days a year. Check the sump first.
59% 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 Garden County, 2.05 inches fell on the wettest day of the 2015–2024 record. Storms like that, and ice dams in snowy winters, cause most roof leaks.
24% of occupied homes in Garden County heat mainly with wood or propane, above the Nebraska county median of 19.4%.
With 3 muggy nights a year, mold in Garden County can appear within days of a leak. Dry first, then clean.
Local risk profile
About 1,761 people live in Garden County, 1,705 square miles in western Nebraska, in roughly 1,173 homes. Oshkosh is the county seat; Lewellen and Lisco are the next largest communities. It has some of the oldest housing in the state: the median home went up in 1953.
59/100 Water Damage Risk Index: Elevated Garden County ranks 18 of 93 Nebraska counties. See the statewide ranking and method.The three factors where Garden County ranks highest compared with other Nebraska counties.
Garden is on the colder side of Nebraska for pipes. From 2015–2024 it averaged 77 nights a year at 20°F or colder, the range where pipes in exterior walls, crawl spaces and unheated garages freeze, and 169 nights at or below 32°F. That ranks 6th of 93 counties.
On February 15, 2021 the low fell to about -24°F, and in the stretch ending January 2018 the county went 13 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 November to April. 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 8 and the last spring freeze around May 10.
Garden gets fewer downpours than most Nebraska counties, but they still fill basements. The county gets about 18.8 inches of rain and melted snow a year, with 2 days of an inch or more (80th of 93). Those downpours cluster in April, May and August, when sump pumps and gutters are tested hardest. The wettest day on record brought 2.05 inches on March 14, 2021. Multi-day storms matter most for basements; the wettest three days on record here totaled 3.14 inches (through May 20, 2018).
The temperature crosses 32°F in both directions on roughly 139 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 77% of the county's housing was built before 1980. That puts Garden near the middle of Nebraska's 93 counties.
Before 1960 is when 59% of these homes went up. Galvanized supply lines and cast iron drains were standard then, and after 60-plus years both corrode and crack, often out of sight inside a wall or under a slab.
27% of homes were vacant at survey time. A leak in an empty rental or seasonal house can run for days before anyone notices, which is why those losses tend to be larger.
Beyond water
Summer nights that don't drop below 65°F, a good marker of humid air, come about 3 times a year here, below the Nebraska county median of 27. 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, Garden County homes break down as 34% utility gas, 42% electric, 20% propane and 4% wood. Wood heat is above the Nebraska norm. Annual chimney and vent inspection, which the NFPA recommends, is one of the most effective fire-prevention habits for these homes.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Garden County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Grant and Sheridan get more pipe-freeze nights than Garden. Deuel County has the oldest housing nearby, with 89% of homes built before 1980.
By the numbers
| Factor | Garden | Nebraska median | Rank |
|---|---|---|---|
| Homes built before 1960 | 59% | 49% | 14 of 93 |
| Homes built before 1980 | 77% | 73% | 35 of 93 |
| Homes built 2000 or later | 8.4% | 12% | 68 of 93 |
| Manufactured or mobile homes | 5.3% | 5% | 39 of 93 |
| Vacant homes | 27% | 14% | 12 of 93 |
| Wood or propane heat | 24% | 19% | 36 of 93 |
| Nights at 20°F or colder | 77/yr | 64/yr | 6 of 93 |
| Days with 1 inch+ of rain | 2/yr | 5.1/yr | 80 of 93 |
| Freeze-thaw days | 139/yr | 112/yr | 8 of 93 |
| Muggy nights (65°F+) | 3/yr | 27/yr | 83 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 Garden County: freezing from November to April, heavy rain in April, May 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