Will Pipes Freeze in Adams County, IA? 72 nights a Year
Freeze nights in Adams County
In a normal year Adams County, IA gets 72 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 78% of US counties.
Risk level: Severe. The risk season runs November to April, worst in January.
It depends where the pipe is
| Pipe | Freezes near | Nights a year |
|---|---|---|
| Outdoor spigot, open crawlspace | 32°F | 147 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 72 nights |
| Insulated pipe in unheated space | 10°F | 36 nights |
| Inside the heated house | 0°F | 12 nights |
Foam-sleeving a bare pipe in unheated space takes it from 72 nights of risk to 36 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 10/12, last around 04/27. For 20°F: 11/10 to 03/30.
How cold Adams County nights get
Average winter (Dec-Feb) low: 15°F; the coldest month, January, averages 12°F overnight. 8 months normally bring at least one night below 32°F (Jan, Feb, Mar, Apr, May, Oct, Nov, Dec). Nights below 10°F, cold enough to freeze insulated pipe in an unheated space, come in January, February, March, November, December: 36 nights a year, and 12 nights below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 12°F | 16°F | 27°F | 37°F | 49°F | 59°F | 64°F | 61°F | 52°F | 40°F | 27°F | 18°F |
Adams County next to its neighbours
Cass County, IA, 40 km northwest, gets 79 nights below 20°F to Adams County's 72 nights. Taylor County, IA, 32 km south, gets 67 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Adams County, IA | - | 147 nights | 72 nights | 12°F |
| Taylor County, IA | 32 km south | 139 nights | 67 nights | 12°F |
| Union County, IA | 38 km east | 144 nights | 71 nights | 11°F |
| Montgomery County, IA | 39 km west | 143 nights | 70 nights | 12°F |
| Adair County, IA | 39 km northeast | 138 nights | 67 nights | 11°F |
| Cass County, IA | 40 km northwest | 152 nights | 79 nights | 10°F |
| Page County, IA | 49 km southwest | 145 nights | 70 nights | 12°F |
Adams County within IA
Adams County ranks 64 of 99 IA counties for nights below 20°F. The most is Osceola County, IA at 99 nights, with a 8°F average winter low. The fewest is Des Moines County, IA: 52 nights, winter lows near 19°F. At 1,190 ft, Adams County sits 100 ft above the state's median county elevation of 1,090 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.
Interior pipes have a threshold too: the four freeze points.
Where this comes from
NOAA 1991-2020 climate normals, blended from 3 nearby stations and adjusted for elevation; closest is Corning, IA, 6 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.