Sebastian, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sebastian, a community in Willacy County, Texas.
Overnight
77°F
Partly Cloudy
Partly cloudy, with a low around 77. South southeast wind around 7 mph.
7-day forecast for Sebastian
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 77°F | Partly Cloudy | 7 mph SSE | 0% |
| Tuesday | 99°F | Sunny | 8 to 17 mph SSE | 2% |
| Tuesday Night | 78°F | Mostly Clear | 8 to 16 mph SE | 1% |
| Wednesday | 99°F | Mostly Sunny | 8 to 15 mph SE | 2% |
| Wednesday Night | 78°F | Mostly Clear | 6 to 15 mph SE | 0% |
| Thursday | 100°F | Sunny | 6 to 15 mph SE | 12% |
| Thursday Night | 77°F | Mostly Clear | 5 to 15 mph SE | 12% |
| Friday | 98°F | Sunny then Slight Chance Showers And Thunderstorms | 3 to 14 mph SE | 19% |
| Friday Night | 76°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 1 to 14 mph SE | 19% |
| Saturday | 97°F | Sunny | 1 to 13 mph ESE | 10% |
| Saturday Night | 76°F | Mostly Clear | 2 to 13 mph SE | 10% |
| Sunday | 97°F | Sunny | 1 to 13 mph SE | 13% |
| Sunday Night | 77°F | Mostly Clear | 5 to 13 mph SE | 13% |
| Monday | 98°F | Sunny | 5 to 16 mph SSE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Sebastian (26.345, -97.796). Updated through the day.
Growing snapshot for Sebastian
Last spring frost
Jan 10
First fall frost
Dec 27
Growing season
355 days
Hardiness zone
10a
More local growing data for Sebastian: nearby ZIP 78594 weather · frost dates · planting calendar · Texas frost dates
Nearby towns & communities
Lasara
Los Angeles
Lyford
Port Mansfield
Ranchette Estates
Raymondville
San Perlita
Yznaga
Zapata Ranch
Climate data from the nearest NOAA station, Santa Rosa 3 Wnw, Tx (6.9 mi from Sebastian). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.