Will Pipes Freeze in Louisa County, VA? 30 nights a Year
Freeze nights in Louisa County
In a normal year Louisa County, VA gets 30 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 46% 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 | 110 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 30 nights |
| Insulated pipe in unheated space | 10°F | 5 nights |
| Inside the heated house | 0°F | under 1 night |
Foam-sleeving a bare pipe in unheated space takes it from 30 nights of risk to 5 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 10/20, last around 04/26. For 20°F: 11/21 to 03/19.
How cold Louisa County nights get
Average winter (Dec-Feb) low: 27°F; the coldest month, January, averages 25°F overnight. 8 months normally bring at least one night below 32°F (Jan, Feb, Mar, Apr, May, Oct, Nov, Dec). Nights below 10°F, cold enough to freeze insulated pipe in an unheated space, come in January, February, December: 5 nights a year, and under 1 night below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 25°F | 27°F | 33°F | 42°F | 52°F | 61°F | 65°F | 64°F | 57°F | 45°F | 34°F | 28°F |
Louisa County next to its neighbours
Fluvanna County, VA, 33 km southwest, gets 31 nights below 20°F to Louisa County's 30 nights. Goochland County, VA, 28 km south, gets 27 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Louisa County, VA | - | 110 nights | 30 nights | 25°F |
| Goochland County, VA | 28 km south | 108 nights | 27 nights | 26°F |
| Orange County, VA | 31 km north | 98 nights | 25 nights | 25°F |
| Fluvanna County, VA | 33 km southwest | 113 nights | 31 nights | 25°F |
| Spotsylvania County, VA | 35 km northeast | 100 nights | 23 nights | 26°F |
| Charlottesville city, VA | 47 km west | 95 nights | 22 nights | 26°F |
| Powhatan County, VA | 47 km south | 105 nights | 26 nights | 26°F |
Louisa County within VA
Louisa County ranks 43 of 133 VA counties for nights below 20°F. The most is Highland County, VA at 62 nights, with a 20°F average winter low. The fewest is Norfolk city, VA: 4 nights, winter lows near 35°F. At 404 ft, Louisa County sits close to the state's median county elevation of 448 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.
What insulating actually removes here, and when heat tape is needed: insulate or heat tape?.
Where this comes from
NOAA 1991-2020 climate normals, blended from 3 nearby stations and adjusted for elevation; closest is Louisa, VA, 9 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.