Will Pipes Freeze in San Jacinto County, TX? 1 night a Year
Freeze nights in San Jacinto County
In a normal year San Jacinto County, TX gets 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 7% of US counties.
Risk level: Rare. The risk season runs January to January, worst in January.
It depends where the pipe is
| Pipe | Freezes near | Nights a year |
|---|---|---|
| Outdoor spigot, open crawlspace | 32°F | 31 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 1 night |
| Insulated pipe in unheated space | 10°F | none |
| Inside the heated house | 0°F | none |
Foam-sleeving a bare pipe in unheated space takes it from 1 night of risk to none. 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 11/20, last around 03/07. For 20°F: 01/05 to 01/16.
How cold San Jacinto County nights get
Average winter (Dec-Feb) low: 41°F; the coldest month, January, averages 39°F overnight. 5 months normally bring at least one night below 32°F (Jan, Feb, Mar, Nov, Dec).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 39°F | 43°F | 50°F | 56°F | 64°F | 71°F | 73°F | 72°F | 67°F | 57°F | 47°F | 41°F |
San Jacinto County next to its neighbours
Montgomery County, TX, 45 km southwest, gets under 1 night.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| San Jacinto County, TX | - | 31 nights | 1 night | 39°F |
| Polk County, TX | 39 km northeast | 36 nights | 1 night | 40°F |
| Walker County, TX | 43 km northwest | 19 nights | under 1 night | 41°F |
| Montgomery County, TX | 45 km southwest | 19 nights | under 1 night | 41°F |
| Liberty County, TX | 55 km southeast | 15 nights | under 1 night | 41°F |
| Trinity County, TX | 58 km north | 27 nights | 1 night | 38°F |
| Tyler County, TX | 78 km east | 31 nights | 1 night | 38°F |
San Jacinto County within TX
San Jacinto County ranks 197 of 254 TX counties for nights below 20°F. The most is Lipscomb County, TX at 57 nights, with a 20°F average winter low. The fewest is Cameron County, TX: none, winter lows near 54°F. At 258 ft, San Jacinto County sits 735 ft below the state's median county elevation of 992 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.
A few nights a year catches houses that were never built for it: pipes 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 Cleveland, TX, 25 km away (fair 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.