Casa Blanca, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Casa Blanca, a community in Starr County, Texas.
Today
100°F
Sunny
Sunny, with a high near 100. Heat index values as high as 111. Southeast wind 12 to 15 mph, with gusts as high as 25 mph.
7-day forecast for Casa Blanca
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 100°F | Sunny | 12 to 15 mph SE | 1% |
| Tonight | 79°F | Partly Cloudy | 9 to 15 mph SE | 2% |
| Wednesday | 100°F | Mostly Sunny | 9 to 13 mph SE | 1% |
| Wednesday Night | 79°F | Mostly Clear | 7 to 14 mph SE | 0% |
| Thursday | 101°F | Sunny | 7 to 13 mph SE | 6% |
| Thursday Night | 78°F | Mostly Clear | 7 to 14 mph SE | 6% |
| Friday | 100°F | Sunny | 6 to 12 mph SE | 6% |
| Friday Night | 78°F | Mostly Clear | 5 to 13 mph SE | 6% |
| Saturday | 99°F | Sunny | 3 to 9 mph ESE | 4% |
| Saturday Night | 78°F | Mostly Clear | 5 to 12 mph SE | 4% |
| Sunday | 99°F | Sunny | 3 to 10 mph SE | 5% |
| Sunday Night | 79°F | Mostly Clear | 8 to 13 mph SE | 5% |
| Monday | 101°F | Sunny | 7 to 15 mph SE | 2% |
| Monday Night | 79°F | Mostly Clear | 12 to 15 mph SE | 2% |
Forecast source: National Weather Service (api.weather.gov) for Casa Blanca (26.298, -98.610). Updated through the day.
Growing snapshot for Casa Blanca
Last spring frost
Jan 31
First fall frost
Dec 17
Growing season
321 days
Hardiness zone
10a
More local growing data for Casa Blanca: nearby ZIP 78548 weather · frost dates · planting calendar · Texas frost dates
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Climate data from the nearest NOAA station, Rio Grande City, Tx (11.9 mi from Casa Blanca). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.