Will Pipes Freeze in St. Johns County, FL? No Normal Risk Nights
Freeze nights in St. Johns County
A normal winter in St. Johns County, FL 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 | 6 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 01/05, last around 02/01.
How cold St. Johns County nights get
Average winter (Dec-Feb) low: 49°F; the coldest month, January, averages 47°F overnight. 3 months normally bring at least one night below 32°F (Jan, Feb, Dec).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 47°F | 49°F | 54°F | 59°F | 66°F | 71°F | 73°F | 74°F | 72°F | 65°F | 56°F | 50°F |
St. Johns County next to its neighbours
The six closest counties all sit within a night of St. Johns County.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| St. Johns County, FL | - | 6 nights | none | 47°F |
| Putnam County, FL | 46 km southwest | 8 nights | none | 45°F |
| Clay County, FL | 46 km west | 14 nights | under 1 night | 45°F |
| Flagler County, FL | 48 km south | 5 nights | none | 48°F |
| Duval County, FL | 55 km northwest | 7 nights | under 1 night | 46°F |
| Bradford County, FL | 74 km west | 15 nights | under 1 night | 45°F |
| Nassau County, FL | 87 km northwest | 14 nights | under 1 night | 43°F |
St. Johns County within FL
St. Johns County ranks 42 of 67 FL counties for nights below 20°F. The most is Holmes County, FL at 2 nights, with a 40°F average winter low. The fewest is Broward County, FL: none, winter lows near 60°F. At 42 ft, St. Johns County sits close to the state's median county elevation of 54 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 St Augustine Lighthouse, FL, 11 km away (close match). A normal year, not tonight's forecast: check the forecast low for the night itself. How a county figure is built from stations: how the numbers are made.