Will Pipes Freeze in Williamsburg County, SC? 7 nights a Year
Freeze nights in Williamsburg County
In a normal year Williamsburg County, SC gets 7 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 21% 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 | 60 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 7 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 7 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 11/06, last around 03/29. For 20°F: 12/16 to 02/16.
How cold Williamsburg County nights get
Average winter (Dec-Feb) low: 35°F; the coldest month, January, averages 33°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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 33°F | 35°F | 41°F | 49°F | 58°F | 66°F | 70°F | 69°F | 63°F | 52°F | 41°F | 35°F |
Williamsburg County next to its neighbours
Florence County, SC, 45 km north, gets 4 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Williamsburg County, SC | - | 60 nights | 7 nights | 33°F |
| Florence County, SC | 45 km north | 48 nights | 4 nights | 35°F |
| Georgetown County, SC | 45 km southeast | 35 nights | 2 nights | 37°F |
| Clarendon County, SC | 47 km west | 48 nights | 4 nights | 35°F |
| Berkeley County, SC | 52 km southwest | 33 nights | 2 nights | 38°F |
| Marion County, SC | 61 km northeast | 51 nights | 4 nights | 34°F |
| Sumter County, SC | 69 km northwest | 55 nights | 5 nights | 33°F |
Williamsburg County within SC
Williamsburg County ranks 16 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 62 ft, Williamsburg County sits 198 ft below 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.
Whether foam sleeves are enough here: insulate or heat tape?.
Where this comes from
NOAA 1991-2020 climate normals, blended from 3 nearby stations and adjusted for elevation; closest is Kingstree, SC, 12 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.