Will Pipes Freeze in Pocahontas County, IA? 86 nights a Year
Freeze nights in Pocahontas County
In a normal year Pocahontas County, IA gets 86 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 85% of US counties.
Risk level: Severe. The risk season runs October to April, worst in January.
It depends where the pipe is
| Pipe | Freezes near | Nights a year |
|---|---|---|
| Outdoor spigot, open crawlspace | 32°F | 157 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 86 nights |
| Insulated pipe in unheated space | 10°F | 49 nights |
| Inside the heated house | 0°F | 23 nights |
Foam-sleeving a bare pipe in unheated space takes it from 86 nights of risk to 49 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 10/07, last around 04/26. For 20°F: 11/05 to 03/31.
How cold Pocahontas County nights get
Average winter (Dec-Feb) low: 11°F; the coldest month, January, averages 8°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, November, December: 49 nights a year, and 23 nights below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 8°F | 12°F | 24°F | 36°F | 49°F | 59°F | 62°F | 60°F | 50°F | 38°F | 25°F | 14°F |
Pocahontas County next to its neighbours
Buena Vista County, IA, 38 km west, gets 85 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Pocahontas County, IA | - | 157 nights | 86 nights | 8°F |
| Buena Vista County, IA | 38 km west | 154 nights | 85 nights | 8°F |
| Palo Alto County, IA | 38 km north | 153 nights | 83 nights | 7°F |
| Calhoun County, IA | 39 km south | 154 nights | 82 nights | 8°F |
| Humboldt County, IA | 39 km east | 154 nights | 82 nights | 8°F |
| Sac County, IA | 52 km southwest | 157 nights | 83 nights | 8°F |
| Webster County, IA | 53 km southeast | 157 nights | 83 nights | 8°F |
Pocahontas County within IA
Pocahontas County ranks 17 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 1,236 ft, Pocahontas County sits 146 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.
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 Pocahontas, IA, 2 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.