Will Pipes Freeze in Harmon County, OK? 19 nights a Year
Freeze nights in Harmon County
In a normal year Harmon County, OK gets 19 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 35% 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 | 90 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 19 nights |
| Insulated pipe in unheated space | 10°F | 3 nights |
| Inside the heated house | 0°F | under 1 night |
Foam-sleeving a bare pipe in unheated space takes it from 19 nights of risk to 3 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 10/31, last around 04/05. For 20°F: 11/30 to 02/28.
How cold Harmon County nights get
Average winter (Dec-Feb) low: 27°F; the coldest month, January, averages 25°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, December: 3 nights a year, and under 1 night below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 25°F | 28°F | 36°F | 45°F | 56°F | 66°F | 70°F | 69°F | 61°F | 48°F | 35°F | 27°F |
Harmon County next to its neighbours
Greer County, OK, 34 km northeast, gets 20 nights below 20°F to Harmon County's 19 nights. Childress County, TX, 41 km southwest, gets 13 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Harmon County, OK | - | 90 nights | 19 nights | 25°F |
| Greer County, OK | 34 km northeast | 89 nights | 20 nights | 25°F |
| Childress County, TX | 41 km southwest | 75 nights | 13 nights | 28°F |
| Jackson County, OK | 43 km southeast | 84 nights | 16 nights | 26°F |
| Collingsworth County, TX | 46 km northwest | 83 nights | 17 nights | 27°F |
| Hardeman County, TX | 52 km south | 78 nights | 14 nights | 27°F |
| Beckham County, OK | 60 km north | 98 nights | 26 nights | 24°F |
Harmon County within OK
Harmon County ranks 41 of 77 OK counties for nights below 20°F. The most is Beaver County, OK at 55 nights, with a 21°F average winter low. The fewest is Choctaw County, OK: 7 nights, winter lows near 34°F. At 1,725 ft, Harmon County sits 717 ft above the state's median county elevation of 1,009 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 Hollis Mesonet (5 mi E), OK, 7 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.