Will Pipes Freeze in Cooper County, MO? 39 nights a Year
Freeze nights in Cooper County
In a normal year Cooper County, MO gets 39 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 55% 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 | 107 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 39 nights |
| Insulated pipe in unheated space | 10°F | 14 nights |
| Inside the heated house | 0°F | 4 nights |
Foam-sleeving a bare pipe in unheated space takes it from 39 nights of risk to 14 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 10/29, last around 04/05. For 20°F: 11/29 to 03/05.
How cold Cooper County nights get
Average winter (Dec-Feb) low: 23°F; the coldest month, January, averages 20°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: 14 nights a year, and 4 nights below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 20°F | 24°F | 34°F | 44°F | 55°F | 65°F | 69°F | 66°F | 57°F | 45°F | 34°F | 25°F |
Cooper County next to its neighbours
Howard County, MO, 34 km north, gets 40 nights below 20°F to Cooper County's 39 nights. Moniteau County, MO, 31 km southeast, gets 38 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Cooper County, MO | - | 107 nights | 39 nights | 20°F |
| Moniteau County, MO | 31 km southeast | 105 nights | 38 nights | 20°F |
| Howard County, MO | 34 km north | 109 nights | 40 nights | 19°F |
| Pettis County, MO | 43 km west | 114 nights | 42 nights | 20°F |
| Boone County, MO | 46 km east | 94 nights | 31 nights | 22°F |
| Saline County, MO | 47 km northwest | 115 nights | 44 nights | 19°F |
| Morgan County, MO | 48 km south | 109 nights | 39 nights | 22°F |
Cooper County within MO
Cooper County ranks 64 of 115 MO counties for nights below 20°F. The most is Caldwell County, MO at 65 nights, with a 19°F average winter low. The fewest is Pemiscot County, MO: 14 nights, winter lows near 31°F. At 727 ft, Cooper County sits 115 ft below the state's median county elevation of 842 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.
Why 20°F is the line for a garage pipe: how cold before pipes freeze.
Where this comes from
NOAA 1991-2020 climate normals, blended from 3 nearby stations and adjusted for elevation; closest is Boonville, MO, 14 km away (close match). A normal year, not tonight's forecast: check the forecast low for the night itself. What a "fair" or "distant" station match means is in the method guide.