Sebastian, TX Weather & Growing Conditions

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

Tonight

65°F

Chance Rain Showers

A chance of rain showers before 1am. Mostly cloudy, with a low around 65. North wind 7 to 10 mph. Chance of precipitation is 40%.

7-day forecast for Sebastian

When	Temp	Forecast	Wind	Precip
Tonight	65°F	Chance Rain Showers	7 to 10 mph N	35%
Wednesday	83°F	Mostly Sunny	7 to 10 mph NNE	4%
Wednesday Night	67°F	Partly Cloudy	2 to 9 mph ESE	2%
Thursday	90°F	Mostly Sunny	3 to 9 mph SE	7%
Thursday Night	69°F	Showers And Thunderstorms Likely	3 to 8 mph SW	74%
Friday	80°F	Chance Showers And Thunderstorms then Partly Sunny	7 to 14 mph N	44%
Friday Night	63°F	Partly Cloudy then Slight Chance Rain Showers	5 to 9 mph N	23%
Saturday	78°F	Chance Rain Showers	9 to 13 mph N	47%
Saturday Night	60°F	Chance Showers And Thunderstorms	8 to 15 mph N	35%
Sunday	75°F	Chance Rain Showers	9 to 15 mph N	26%
Sunday Night	56°F	Slight Chance Rain Showers then Partly Cloudy	5 to 8 mph N	15%
Monday	76°F	Mostly Sunny	9 mph NNE	5%
Monday Night	56°F	Partly Cloudy	2 to 7 mph ENE	1%
Tuesday	80°F	Mostly Sunny	3 to 9 mph ENE	2%

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

All Texas locations ›

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.