Sebastian, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sebastian, a community in Willacy County, Texas.
Overnight
65°F
Partly Cloudy
Partly cloudy, with a low around 65. North wind around 12 mph, with gusts as high as 22 mph.
7-day forecast for Sebastian
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 65°F | Partly Cloudy | 12 mph N | 6% |
| Wednesday | 82°F | Sunny | 7 to 12 mph NE | 2% |
| Wednesday Night | 66°F | Mostly Clear | 1 to 9 mph E | 1% |
| Thursday | 88°F | Mostly Sunny | 3 to 9 mph SE | 7% |
| Thursday Night | 69°F | Showers And Thunderstorms Likely | 3 to 8 mph SSE | 74% |
| Friday | 81°F | Chance Rain Showers | 6 to 14 mph N | 44% |
| Friday Night | 64°F | Mostly Cloudy | 5 to 9 mph NNE | 7% |
| Saturday | 79°F | Partly Sunny then Slight Chance Rain Showers | 12 mph NNE | 23% |
| Saturday Night | 61°F | Chance Rain Showers | 9 to 16 mph NNE | 37% |
| Sunday | 72°F | Chance Rain Showers | 13 to 16 mph N | 43% |
| Sunday Night | 55°F | Mostly Cloudy | 7 to 12 mph N | 13% |
| Monday | 74°F | Mostly Sunny | 9 mph NNE | 4% |
| Monday Night | 56°F | Partly Cloudy | 2 to 7 mph NE | 2% |
| Tuesday | 78°F | Mostly Sunny | 7 mph NE | 5% |
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 Nov 4, 2026.