Will Pipes Freeze in Clark County, WA? 5 nights a Year
Freeze nights in Clark County
In a normal year Clark County, WA gets 5 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 18% of US counties.
Risk level: Occasional. The risk season runs November to February, worst in January.
It depends where the pipe is
| Pipe | Freezes near | Nights a year |
|---|---|---|
| Outdoor spigot, open crawlspace | 32°F | 71 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 5 nights |
| Insulated pipe in unheated space | 10°F | under 1 night |
| Inside the heated house | 0°F | none |
Foam-sleeving a bare pipe in unheated space takes it from 5 nights of risk to under 1 night. 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 10/16, last around 04/26. For 20°F: 12/13 to 01/31.
How cold Clark County nights get
Average winter (Dec-Feb) low: 32°F; the coldest month, February, averages 32°F overnight. 8 months normally bring at least one night below 32°F (Jan, Feb, Mar, Apr, May, Oct, Nov, Dec).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 32°F | 32°F | 35°F | 38°F | 43°F | 48°F | 51°F | 50°F | 46°F | 40°F | 36°F | 32°F |
Clark County next to its neighbours
Columbia County, OR, 50 km northwest, gets 7 nights below 20°F to Clark County's 5 nights. Multnomah County, OR, 25 km south, gets 2 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Clark County, WA | - | 71 nights | 5 nights | 32°F |
| Multnomah County, OR | 25 km south | 31 nights | 2 nights | 37°F |
| Cowlitz County, WA | 50 km north | 43 nights | 3 nights | 35°F |
| Columbia County, OR | 50 km northwest | 85 nights | 7 nights | 32°F |
| Skamania County, WA | 50 km northeast | 145 nights | 21 nights | 27°F |
| Washington County, OR | 53 km southwest | 60 nights | 4 nights | 33°F |
| Hood River County, OR | 71 km southeast | 140 nights | 17 nights | 28°F |
Clark County within WA
Clark County ranks 26 of 39 WA counties for nights below 20°F. The most is Ferry County, WA at 62 nights, with a 18°F average winter low. The fewest is Island County, WA: 1 night, winter lows near 37°F. At 496 ft, Clark County sits 1,123 ft below the state's median county elevation of 1,620 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.
Few hard nights means pipes are rarely built for them; see freezes in warm places.
Where this comes from
NOAA 1991-2020 climate normals, blended from 3 nearby stations and adjusted for elevation; closest is Battle Ground, WA, 3 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.