Will Pipes Freeze in Montgomery County, MO? 42 nights a Year
Freeze nights in Montgomery County
In a normal year Montgomery County, MO gets 42 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 58% of US counties.
Risk level: Severe. 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 | 114 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 42 nights |
| Insulated pipe in unheated space | 10°F | 16 nights |
| Inside the heated house | 0°F | 4 nights |
Foam-sleeving a bare pipe in unheated space takes it from 42 nights of risk to 16 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 10/23, last around 04/14. For 20°F: 11/24 to 03/13.
How cold Montgomery County nights get
Average winter (Dec-Feb) low: 22°F; the coldest month, January, averages 19°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: 16 nights a year, and 4 nights below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 19°F | 23°F | 33°F | 43°F | 53°F | 62°F | 66°F | 64°F | 56°F | 44°F | 34°F | 25°F |
Montgomery County next to its neighbours
Callaway County, MO, 41 km west, gets 44 nights below 20°F to Montgomery County's 42 nights. Warren County, MO, 33 km southeast, gets 41 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Montgomery County, MO | - | 114 nights | 42 nights | 19°F |
| Warren County, MO | 33 km southeast | 112 nights | 41 nights | 20°F |
| Callaway County, MO | 41 km west | 116 nights | 44 nights | 20°F |
| Audrain County, MO | 45 km northwest | 113 nights | 42 nights | 19°F |
| Lincoln County, MO | 46 km east | 108 nights | 39 nights | 20°F |
| Pike County, MO | 52 km northeast | 117 nights | 45 nights | 19°F |
| Gasconade County, MO | 55 km south | 119 nights | 46 nights | 19°F |
Montgomery County within MO
Montgomery County ranks 46 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 839 ft, Montgomery County sits close to the state's median county elevation of 842 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 Warrenton (1 mi N), MO, 30 km away (fair 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.