Tioga County, Pennsylvania · Wellsboro
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With 41% of homes built before 1960 and about 55 hard-freeze nights a year, frozen and split pipes are a leading winter risk in the county.
July brings the most downpours to Tioga County, part of 5.8 heavy-rain days a year. Check the sump first.
Backups often follow heavy rain, which Tioga County gets about 5.8 days a year, when storm water overloads sewer mains and pushes up through the lowest drain in the house.
In Tioga County, 2.84 inches fell on the wettest day of the 2015–2024 record. Storms like that, and ice dams in snowy winters, cause most roof leaks.
18% of occupied homes in Tioga County heat mainly with wood or propane, above the Pennsylvania county median of 10%.
With 3 muggy nights a year, mold in Tioga County can appear within days of a leak. Dry first, then clean.
Local risk profile
Tioga County covers 1,134 square miles of northern Pennsylvania, with about 40,945 residents and 21,571 homes. The county seat is Wellsboro, and Mansfield, Blossburg and Elkland round out the largest towns. Half the homes here were built before 1972, half after.
48/100 Water Damage Risk Index: Elevated Tioga County ranks 39 of 67 Pennsylvania counties. See the statewide ranking and method.The three factors where Tioga County ranks highest compared with other Pennsylvania counties.
Tioga County gets more hard-freeze nights than most of Pennsylvania. From 2015–2024 it averaged 55 nights a year at 20°F or colder, the range where pipes in exterior walls, crawl spaces and unheated garages freeze, and 150 nights at or below 32°F. That ranks 3rd of 67 counties.
On February 24, 2015 the low fell to about -15°F, and in the stretch ending January 2018 the county went 14 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.
Freezing nights typically start around Oct 15 and end around May 11.
Tioga gets fewer downpours than most Pennsylvania counties, but they still fill basements. About 5.8 days a year bring an inch or more (54th of 67), most often in July, out of 41.4 inches of total precipitation. On August 10, 2024, 2.84 inches fell in a single day. The worst three-day stretch dropped 4.47 inches, ending July 24, 2018, the kind of soaking that overwhelms sump pumps and storm sewers.
The temperature crosses 32°F in both directions on roughly 110 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 62% of the county's housing was built before 1980. That puts Tioga near the middle of Pennsylvania's 67 counties.
The mix runs from 41% built before 1960 to 16% built since 2000, so older neighborhoods bring aging pipe while newer subdivisions bring failed appliance lines and water heaters.
Here 17% 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.
23% 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
About 3 nights a year in Tioga County stay at 65°F or warmer, a sign of muggy summer air (66th of 67 counties). July is the wettest month. 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 expectHeating fuel matters for fire risk. In Tioga County it's 66% utility gas, 8% electric, 8% propane and 11% wood. Wood heat is more common here than in most Pennsylvania counties. Heating equipment is one of the leading causes of home fires nationally, and the NFPA recommends having chimneys and vents inspected every year.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Tioga County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Potter gets more pipe-freeze nights than Tioga. All of its neighbors see more heavy-rain days. Lycoming County has the oldest housing nearby, with 70% of homes built before 1980.
By the numbers
| Factor | Tioga | Pennsylvania median | Rank |
|---|---|---|---|
| Homes built before 1960 | 41% | 42% | 35 of 67 |
| Homes built before 1980 | 62% | 66% | 39 of 67 |
| Homes built 2000 or later | 16% | 13% | 24 of 67 |
| Manufactured or mobile homes | 17% | 6.6% | 1 of 67 |
| Vacant homes | 23% | 12% | 10 of 67 |
| Wood or propane heat | 18% | 10% | 17 of 67 |
| Nights at 20°F or colder | 55/yr | 37/yr | 3 of 67 |
| Days with 1 inch+ of rain | 5.8/yr | 7/yr | 54 of 67 |
| Freeze-thaw days | 110/yr | 98/yr | 2 of 67 |
| Muggy nights (65°F+) | 3/yr | 16/yr | 66 of 67 |
Rank 1 is the highest value. Bars run from the lowest to the highest Pennsylvania county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Tioga County: freezing from November to April, heavy rain in April, July 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