Will Pipes Freeze in Dimmit County, TX? under 1 night a Year
Freeze nights in Dimmit County
In a normal year Dimmit County, TX 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 5% of US counties.
Risk level: Rare.
It depends where the pipe is
| Pipe | Freezes near | Nights a year |
|---|---|---|
| Outdoor spigot, open crawlspace | 32°F | 21 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 |
Foam-sleeving a bare pipe in unheated space takes it from under 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 11/22, last around 03/05. For 20°F: 01/02 to 01/11.
How cold Dimmit 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 | 44°F | 51°F | 58°F | 67°F | 72°F | 74°F | 74°F | 69°F | 60°F | 49°F | 40°F |
Dimmit County next to its neighbours
Uvalde County, TX, 103 km north, gets 3 nights below 20°F to Dimmit County's under 1 night. Webb County, TX, 85 km southeast, gets none.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Dimmit County, TX | - | 21 nights | under 1 night | 39°F |
| Zavala County, TX | 49 km north | 12 nights | under 1 night | 42°F |
| Maverick County, TX | 64 km northwest | 13 nights | under 1 night | 40°F |
| La Salle County, TX | 66 km east | 13 nights | under 1 night | 43°F |
| Frio County, TX | 81 km northeast | 11 nights | under 1 night | 42°F |
| Webb County, TX | 85 km southeast | 7 nights | none | 45°F |
| Uvalde County, TX | 103 km north | 34 nights | 3 nights | 37°F |
Dimmit County within TX
Dimmit County ranks 209 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 556 ft, Dimmit County sits 436 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.
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 Carrizo Springs (3 mi S), TX, 13 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.