Will Pipes Freeze in Hawaii County, HI? No Normal Risk Nights
Freeze nights in Hawaii County
A normal winter in Hawaii County, HI never drops to 20°F, the point where bare pipes in unheated space start to freeze.
Risk level: No normal risk nights.
It depends where the pipe is
| Pipe | Freezes near | Nights a year |
|---|---|---|
| Outdoor spigot, open crawlspace | 32°F | 22 nights |
| Bare pipe in garage, attic or outside wall | 20°F | none |
| Insulated pipe in unheated space | 10°F | none |
| Inside the heated house | 0°F | none |
Month by month
Nights at or below 20°F in a normal year.
First 32°F night is usually around 12/01, last around 04/12.
How cold Hawaii County nights get
Average winter (Dec-Feb) low: 41°F; the coldest month, February, averages 41°F overnight. 7 months normally bring at least one night below 32°F (Jan, Feb, Mar, Apr, May, Nov, Dec).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 41°F | 41°F | 41°F | 43°F | 45°F | 47°F | 47°F | 47°F | 47°F | 46°F | 44°F | 42°F |
Hawaii County next to its neighbours
The six closest counties all sit within a night of Hawaii County.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Hawaii County, HI | - | 22 nights | none | 41°F |
| Maui County, HI | 181 km northwest | none | none | 54°F |
| Kalawao County, HI | 237 km northwest | none | none | 64°F |
| Honolulu County, HI | 349 km northwest | none | none | 65°F |
| Kauai County, HI | 513 km northwest | none | none | 64°F |
| San Francisco County, CA | 3725 km northeast | 3 nights | none | 44°F |
| Marin County, CA | 3763 km northeast | 7 nights | none | 42°F |
Hawaii County within HI
Hawaii County ranks 1 of 5 HI counties for nights below 20°F. The fewest is Kalawao County, HI: none, winter lows near 65°F. At 8,254 ft, Hawaii County sits 7,426 ft above the state's median county elevation of 828 ft.
What to do here
- Disconnect hoses in a cold snap; no routine prep needed.
Why the rare freeze catches houses unprepared: freezes in warm places.
Where this comes from
NOAA 1991-2020 climate normals, blended from 3 nearby stations and adjusted for elevation; closest is Mauna Loa (5 mi NNE), HI, 10 km away (distant 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.