Crystal City, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Crystal City, a city in Zavala County, Texas.
Today
100°F
Sunny
Sunny, with a high near 100. Heat index values as high as 108. East southeast wind 5 to 15 mph, with gusts as high as 20 mph.
7-day forecast for Crystal City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 100°F | Sunny | 5 to 15 mph ESE | 7% |
| Tonight | 77°F | Mostly Clear | 10 mph SE | 8% |
| Wednesday | 101°F | Mostly Sunny | 10 mph SE | 2% |
| Wednesday Night | 77°F | Mostly Clear | 10 mph SE | 2% |
| Thursday | 101°F | Sunny | 5 to 10 mph SE | 0% |
| Thursday Night | 77°F | Mostly Clear | 5 to 10 mph SE | 2% |
| Friday | 100°F | Sunny | 5 mph SE | 2% |
| Friday Night | 75°F | Mostly Clear | 5 to 10 mph SE | 2% |
| Saturday | 99°F | Sunny | 5 mph ESE | 0% |
| Saturday Night | 75°F | Mostly Clear | 5 to 10 mph SE | 1% |
| Sunday | 99°F | Sunny | 5 mph ESE | 1% |
| Sunday Night | 75°F | Mostly Clear | 5 to 10 mph SE | 2% |
| Monday | 101°F | Sunny | 5 to 10 mph SE | 2% |
| Monday Night | 75°F | Mostly Clear | 10 mph SE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Crystal City (28.691, -99.827). Updated through the day.
Growing snapshot for Crystal City
Last spring frost
Feb 10
First fall frost
Dec 10
Growing season
307 days
Hardiness zone
9a
More local growing data for Crystal City: nearby ZIP 78839 weather · frost dates · planting calendar · Texas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Crystal City, Tx (6 mi from Crystal City). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.