Will Pipes Freeze in Warren County, PA? 73 nights a Year
Freeze nights in Warren County
In a normal year Warren County, PA gets 73 nights at or below 20°F, the point where bare pipes in a garage, attic or outside wall start to freeze. That is more than 78% of US counties.
Risk level: Severe. The risk season runs November to April, worst in January.
It depends where the pipe is
| Pipe | Freezes near | Nights a year |
|---|---|---|
| Outdoor spigot, open crawlspace | 32°F | 165 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 73 nights |
| Insulated pipe in unheated space | 10°F | 32 nights |
| Inside the heated house | 0°F | 13 nights |
Foam-sleeving a bare pipe in unheated space takes it from 73 nights of risk to 32 nights. A 12 ft heat-tape kit runs $17 to $37; an average burst-pipe repair is about $500.
Month by month
Nights at or below 20°F in a normal year.
First 32°F night is usually around 09/30, last around 05/22. For 20°F: 11/09 to 04/12.
How cold Warren County nights get
Average winter (Dec-Feb) low: 16°F; the coldest month, February, averages 14°F overnight. 9 months normally bring at least one night below 32°F (Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec). Nights below 10°F, cold enough to freeze insulated pipe in an unheated space, come in January, February, March, November, December: 32 nights a year, and 13 nights below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 14°F | 14°F | 21°F | 31°F | 42°F | 51°F | 55°F | 54°F | 47°F | 37°F | 29°F | 21°F |
Warren County next to its neighbours
Cattaraugus County, NY, 69 km northeast, gets 81 nights below 20°F to Warren County's 73 nights. Forest County, PA, 36 km south, gets 69 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Warren County, PA | - | 165 nights | 73 nights | 14°F |
| Forest County, PA | 36 km south | 163 nights | 69 nights | 15°F |
| Chautauqua County, NY | 53 km north | 125 nights | 48 nights | 19°F |
| McKean County, PA | 60 km east | 161 nights | 72 nights | 15°F |
| Venango County, PA | 62 km southwest | 146 nights | 58 nights | 18°F |
| Crawford County, PA | 69 km west | 130 nights | 52 nights | 18°F |
| Cattaraugus County, NY | 69 km northeast | 171 nights | 81 nights | 13°F |
Warren County within PA
Warren County ranks 5 of 67 PA counties for nights below 20°F. The most is Susquehanna County, PA at 80 nights, with a 15°F average winter low. The fewest is Delaware County, PA: 15 nights, winter lows near 28°F. At 1,545 ft, Warren County sits 404 ft above the state's median county elevation of 1,141 ft.
What to do here
- Treat it as a building fix, not a night-of routine: insulate, heat tape, seal crawlspace vents.
- An automatic leak shutoff pays for itself if one burst is avoided.
- Know where the main shutoff is before the first hard freeze.
Interior pipes have a threshold too: the four freeze points.
Where this comes from
NOAA 1991-2020 climate normals, blended from 3 nearby stations and adjusted for elevation; closest is Chandlers Valley (1 mi SE), PA, 11 km away (close match). A normal year, not tonight's forecast: check the forecast low for the night itself. How a county figure is built from stations: how the numbers are made.