Will Pipes Freeze in Scott County, IA? 62 nights a Year
Freeze nights in Scott County
In a normal year Scott County, IA gets 62 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 72% 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 | 136 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 62 nights |
| Insulated pipe in unheated space | 10°F | 30 nights |
| Inside the heated house | 0°F | 13 nights |
Foam-sleeving a bare pipe in unheated space takes it from 62 nights of risk to 30 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 10/17, last around 04/21. For 20°F: 11/16 to 03/20.
How cold Scott County nights get
Average winter (Dec-Feb) low: 17°F; the coldest month, January, averages 14°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, November, December: 30 nights a year, and 13 nights below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 14°F | 18°F | 29°F | 39°F | 51°F | 61°F | 64°F | 62°F | 54°F | 42°F | 30°F | 20°F |
Scott County next to its neighbours
Clinton County, IA, 29 km north, gets 66 nights below 20°F to Scott County's 62 nights. Rock Island County, IL, 20 km south, gets 55 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Scott County, IA | - | 136 nights | 62 nights | 14°F |
| Rock Island County, IL | 20 km south | 126 nights | 55 nights | 14°F |
| Clinton County, IA | 29 km north | 141 nights | 66 nights | 13°F |
| Cedar County, IA | 45 km west | 150 nights | 74 nights | 12°F |
| Muscatine County, IA | 45 km southwest | 126 nights | 57 nights | 14°F |
| Mercer County, IL | 50 km south | 138 nights | 62 nights | 13°F |
| Henry County, IL | 52 km southeast | 131 nights | 58 nights | 14°F |
Scott County within IA
Scott County ranks 88 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 739 ft, Scott County sits 351 ft below 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.
At this many nights, foam alone is not the answer: insulate or heat tape?.
Where this comes from
NOAA 1991-2020 climate normals, blended from 3 nearby stations and adjusted for elevation; closest is Davenport Weather Office, IA, 5 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.