Will Pipes Freeze in Solano County, CA? under 1 night a Year
Freeze nights in Solano County
In a normal year Solano County, CA gets under 1 night at or below 20°F, the point where bare pipes in a garage, attic or outside wall start to freeze. That is more than 3% of US counties.
Risk level: Rare.
It depends where the pipe is
| Pipe | Freezes near | Nights a year |
|---|---|---|
| Outdoor spigot, open crawlspace | 32°F | 14 nights |
| Bare pipe in garage, attic or outside wall | 20°F | under 1 night |
| 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 12/14, last around 01/15.
How cold Solano County nights get
Average winter (Dec-Feb) low: 40°F; the coldest month, December, averages 39°F overnight. 4 months normally bring at least one night below 32°F (Jan, Feb, Nov, Dec).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 39°F | 42°F | 45°F | 47°F | 52°F | 57°F | 59°F | 58°F | 57°F | 51°F | 44°F | 39°F |
Solano County next to its neighbours
The six closest counties all sit within a night of Solano County.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Solano County, CA | - | 14 nights | under 1 night | 39°F |
| Contra Costa County, CA | 39 km south | 11 nights | none | 42°F |
| Napa County, CA | 43 km northwest | 17 nights | none | 39°F |
| Yolo County, CA | 46 km north | 12 nights | none | 38°F |
| Sacramento County, CA | 56 km east | 10 nights | none | 40°F |
| Alameda County, CA | 69 km south | 14 nights | none | 39°F |
| San Joaquin County, CA | 69 km southeast | 21 nights | under 1 night | 39°F |
Solano County within CA
Solano County ranks 37 of 58 CA counties for nights below 20°F. The most is Mono County, CA at 130 nights, with a 13°F average winter low. The fewest is Orange County, CA: none, winter lows near 46°F. At 56 ft, Solano County sits 1,242 ft below the state's median county elevation of 1,298 ft.
What to do here
- Watch the forecast for a sub-threshold night.
- That night: drip the faucet on an outside wall, open the sink cabinet.
Why rare cold catches people out - freezes in places that rarely freeze.
Where this comes from
NOAA 1991-2020 climate normals, blended from 3 nearby stations and adjusted for elevation; closest is Fairfield, CA, 11 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.