Will Pipes Freeze in Campbell County, WY? 84 nights a Year
Freeze nights in Campbell County
In a normal year Campbell County, WY gets 84 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 84% of US counties.
Risk level: Severe. The risk season runs October to April, worst in December.
It depends where the pipe is
| Pipe | Freezes near | Nights a year |
|---|---|---|
| Outdoor spigot, open crawlspace | 32°F | 177 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 84 nights |
| Insulated pipe in unheated space | 10°F | 37 nights |
| Inside the heated house | 0°F | 16 nights |
Foam-sleeving a bare pipe in unheated space takes it from 84 nights of risk to 37 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 10/01, last around 05/15. For 20°F: 10/26 to 04/10.
How cold Campbell County nights get
Average winter (Dec-Feb) low: 15°F; the coldest month, January, averages 15°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, April, October, November, December: 37 nights a year, and 16 nights below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 15°F | 16°F | 24°F | 31°F | 40°F | 50°F | 57°F | 55°F | 46°F | 34°F | 23°F | 15°F |
Campbell County next to its neighbours
Weston County, WY, 85 km southeast, gets 102 nights below 20°F to Campbell County's 84 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Campbell County, WY | - | 177 nights | 84 nights | 15°F |
| Weston County, WY | 85 km southeast | 186 nights | 102 nights | 10°F |
| Johnson County, WY | 87 km west | 190 nights | 99 nights | 11°F |
| Crook County, WY | 87 km northeast | 186 nights | 96 nights | 12°F |
| Sheridan County, WY | 127 km northwest | 185 nights | 93 nights | 13°F |
| Converse County, WY | 134 km south | 182 nights | 92 nights | 13°F |
| Powder River County, MT | 135 km north | 186 nights | 97 nights | 11°F |
Campbell County within WY
Campbell County ranks 22 of 23 WY counties for nights below 20°F. The most is Sublette County, WY at 165 nights, with a 1°F average winter low. The fewest is Platte County, WY: 69 nights, winter lows near 16°F. At 4,895 ft, Campbell County sits 402 ft below the state's median county elevation of 5,297 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.
The dates to be done by: when freeze season starts and ends.
Where this comes from
NOAA 1991-2020 climate normals, blended from 3 nearby stations and adjusted for elevation; closest is Gillette (4 mi SE), WY, 10 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.