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Sebastian, TX Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Sebastian, a community in Willacy County, Texas.

Tonight
76°F
Mostly Clear
Mostly clear, with a low around 76. East northeast wind 0 to 3 mph.

7-day forecast for Sebastian

WhenTempForecastWindPrecip
Tonight 76°F Mostly Clear 0 to 3 mph ENE 0%
Saturday 98°F Sunny 0 to 12 mph ENE 11%
Saturday Night 75°F Mostly Clear 1 to 12 mph ESE 0%
Sunday 99°F Sunny 1 to 12 mph ESE 12%
Sunday Night 76°F Partly Cloudy 2 to 12 mph SE 12%
Monday 99°F Sunny then Slight Chance Showers And Thunderstorms 1 to 13 mph ESE 20%
Monday Night 76°F Slight Chance Showers And Thunderstorms then Mostly Clear 0 to 13 mph E 20%
Tuesday 98°F Sunny then Chance Showers And Thunderstorms 0 to 13 mph E 40%
Tuesday Night 77°F Chance Showers And Thunderstorms then Mostly Clear 0 to 13 mph ENE 40%
Wednesday 97°F Slight Chance Rain Showers then Chance Showers And Thunderstorms 1 to 14 mph ENE 38%
Wednesday Night 77°F Chance Showers And Thunderstorms then Mostly Clear 1 to 13 mph ENE 38%
Thursday 97°F Slight Chance Rain Showers then Chance Showers And Thunderstorms 3 to 14 mph NE 39%
Thursday Night 76°F Chance Showers And Thunderstorms 2 to 13 mph ENE 39%
Friday 96°F Chance Rain Showers then Chance Showers And Thunderstorms 5 to 14 mph NE 38%

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

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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 Sep 19, 2026.