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Castroville, TX Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Castroville, a city in Medina County, Texas.

Overnight
74°F
Mostly Cloudy
Mostly cloudy, with a low around 74. East southeast wind around 5 mph.

7-day forecast for Castroville

WhenTempForecastWindPrecip
Overnight 74°F Mostly Cloudy 5 mph ESE 5%
Saturday 96°F Mostly Sunny 5 mph SE 4%
Saturday Night 73°F Mostly Clear 5 mph SE 2%
Sunday 97°F Mostly Sunny 0 to 5 mph SE 0%
Sunday Night 74°F Partly Cloudy 5 mph SE 6%
Monday 98°F Sunny 0 to 10 mph ESE 8%
Monday Night 74°F Mostly Clear 0 to 10 mph ESE 9%
Tuesday 97°F Sunny 5 to 10 mph ENE 11%
Tuesday Night 74°F Slight Chance Showers And Thunderstorms 5 to 10 mph E 21%
Wednesday 97°F Slight Chance Rain Showers then Mostly Sunny 5 to 10 mph ENE 21%
Wednesday Night 74°F Slight Chance Rain Showers 5 to 10 mph E 16%
Thursday 97°F Mostly Sunny 5 to 10 mph ENE 11%
Thursday Night 73°F Partly Cloudy 5 to 10 mph E 5%
Friday 97°F Mostly Sunny 5 to 10 mph ENE 5%

Forecast source: National Weather Service (api.weather.gov) for Castroville (29.360, -98.855). Updated through the day.

Growing snapshot for Castroville

Last spring frost
Feb 24
First fall frost
Dec 2
Growing season
283 days
Hardiness zone
9a

More local growing data for Castroville: nearby ZIP 78009 weather · frost dates · planting calendar · Texas frost dates

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Climate data from the nearest NOAA station, Lytle 3W, Tx (9.5 mi from Castroville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.