Will Pipes Freeze in Henderson County, TN? 16 nights a Year
Freeze nights in Henderson County
In a normal year Henderson County, TN gets 16 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 33% 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 | 77 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 16 nights |
| Insulated pipe in unheated space | 10°F | 3 nights |
| Inside the heated house | 0°F | none |
Foam-sleeving a bare pipe in unheated space takes it from 16 nights of risk to 3 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 10/30, last around 04/05. For 20°F: 12/05 to 02/26.
How cold Henderson County nights get
Average winter (Dec-Feb) low: 30°F; the coldest month, January, averages 27°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: 3 nights a year, and none below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 27°F | 31°F | 38°F | 46°F | 56°F | 65°F | 68°F | 67°F | 60°F | 47°F | 37°F | 31°F |
Henderson County next to its neighbours
Decatur County, TN, 26 km east, gets 19 nights below 20°F to Henderson County's 16 nights. Madison County, TN, 41 km west, gets 15 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Henderson County, TN | - | 77 nights | 16 nights | 27°F |
| Decatur County, TN | 26 km east | 84 nights | 19 nights | 28°F |
| Chester County, TN | 33 km southwest | 88 nights | 22 nights | 27°F |
| Carroll County, TN | 35 km north | 85 nights | 19 nights | 28°F |
| Madison County, TN | 41 km west | 72 nights | 15 nights | 28°F |
| Perry County, TN | 47 km east | 91 nights | 22 nights | 27°F |
| Hardin County, TN | 53 km south | 73 nights | 15 nights | 30°F |
Henderson County within TN
Henderson County ranks 73 of 95 TN counties for nights below 20°F. The most is Johnson County, TN at 41 nights, with a 25°F average winter low. The fewest is Hamilton County, TN: 9 nights, winter lows near 34°F. At 474 ft, Henderson County sits 393 ft below the state's median county elevation of 867 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 Lexington, TN, 1 km away (close 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.