Will Pipes Freeze in Allendale County, SC? 6 nights a Year
Freeze nights in Allendale County
In a normal year Allendale County, SC gets 6 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 19% of US counties.
Risk level: Occasional. The risk season runs December to February, worst in January.
It depends where the pipe is
| Pipe | Freezes near | Nights a year |
|---|---|---|
| Outdoor spigot, open crawlspace | 32°F | 55 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 6 nights |
| Insulated pipe in unheated space | 10°F | none |
| Inside the heated house | 0°F | none |
Foam-sleeving a bare pipe in unheated space takes it from 6 nights of risk to none. 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 11/07, last around 03/28. For 20°F: 12/27 to 02/04.
How cold Allendale County nights get
Average winter (Dec-Feb) low: 35°F; the coldest month, January, averages 34°F overnight. 7 months normally bring at least one night below 32°F (Jan, Feb, Mar, Apr, Oct, Nov, Dec).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 34°F | 36°F | 42°F | 49°F | 58°F | 66°F | 70°F | 69°F | 63°F | 52°F | 41°F | 36°F |
Allendale County next to its neighbours
Hampton County, SC, 30 km southeast, gets 2 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Allendale County, SC | - | 55 nights | 6 nights | 34°F |
| Hampton County, SC | 30 km southeast | 30 nights | 2 nights | 39°F |
| Barnwell County, SC | 32 km north | 46 nights | 5 nights | 35°F |
| Screven County, GA | 35 km southwest | 43 nights | 3 nights | 36°F |
| Bamberg County, SC | 38 km northeast | 41 nights | 3 nights | 36°F |
| Burke County, GA | 60 km west | 52 nights | 5 nights | 34°F |
| Jenkins County, GA | 60 km west | 43 nights | 3 nights | 35°F |
Allendale County within SC
Allendale County ranks 23 of 46 SC counties for nights below 20°F. The most is Cherokee County, SC at 18 nights, with a 28°F average winter low. The fewest is Charleston County, SC: under 1 night, winter lows near 45°F. At 244 ft, Allendale County sits close to the state's median county elevation of 260 ft.
What to do here
- Keep a night-of routine: drip, open cabinets, keep the heat at 55F or above.
- Foam-sleeve any pipe in the garage or crawlspace once; it is cheap and lasts years.
Which pipe gets which threshold: the 32, 20, 10 and 0 rule.
Where this comes from
NOAA 1991-2020 climate normals, blended from 3 nearby stations and adjusted for elevation; closest is Allendale (2 mi NW), SC, 6 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.