Will Pipes Freeze in Warren County, OH? 37 nights a Year
Freeze nights in Warren County
In a normal year Warren County, OH gets 37 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 53% of US counties.
Risk level: Regular. The risk season runs November to March, worst in January.
It depends where the pipe is
| Pipe | Freezes near | Nights a year |
|---|---|---|
| Outdoor spigot, open crawlspace | 32°F | 110 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 37 nights |
| Insulated pipe in unheated space | 10°F | 12 nights |
| Inside the heated house | 0°F | 3 nights |
Foam-sleeving a bare pipe in unheated space takes it from 37 nights of risk to 12 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 10/26, last around 04/17. For 20°F: 11/30 to 03/14.
How cold Warren County nights get
Average winter (Dec-Feb) low: 24°F; the coldest month, January, averages 22°F overnight. 7 months normally bring at least one night below 32°F (Jan, Feb, Mar, Apr, Oct, Nov, Dec). Nights below 10°F, cold enough to freeze insulated pipe in an unheated space, come in January, February, March, December: 12 nights a year, and 3 nights below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 22°F | 24°F | 32°F | 42°F | 52°F | 61°F | 64°F | 62°F | 55°F | 44°F | 34°F | 27°F |
Warren County next to its neighbours
Butler County, OH, 34 km west, gets 40 nights below 20°F to Warren County's 37 nights. Hamilton County, OH, 41 km southwest, gets 33 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Warren County, OH | - | 110 nights | 37 nights | 22°F |
| Clinton County, OH | 31 km east | 108 nights | 37 nights | 22°F |
| Butler County, OH | 34 km west | 115 nights | 40 nights | 21°F |
| Greene County, OH | 37 km northeast | 106 nights | 36 nights | 22°F |
| Montgomery County, OH | 38 km north | 107 nights | 37 nights | 21°F |
| Hamilton County, OH | 41 km southwest | 104 nights | 33 nights | 22°F |
| Clermont County, OH | 42 km south | 109 nights | 33 nights | 23°F |
Warren County within OH
Warren County ranks 79 of 88 OH counties for nights below 20°F. The most is Williams County, OH at 61 nights, with a 19°F average winter low. The fewest is Scioto County, OH: 28 nights, winter lows near 24°F. At 840 ft, Warren County sits 76 ft below the state's median county elevation of 916 ft.
What to do here
- Insulate every pipe in unheated space before the season starts.
- Heat tape on the runs you cannot insulate well.
- Shut off and drain outdoor spigots for the season.
When to have the house ready: when freeze season starts.
Where this comes from
NOAA 1991-2020 climate normals, blended from 3 nearby stations and adjusted for elevation; closest is Dayton Wright Bros Airport, OH, 19 km away (close match). A normal year, not tonight's forecast: check the forecast low for the night itself. Why elevation is part of the blend: how county numbers are made.