El Castillo, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for El Castillo, a community in Starr County, Texas.
Overnight
78°F
Partly Cloudy
Partly cloudy, with a low around 78. East southeast wind around 2 mph.
7-day forecast for El Castillo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 78°F | Partly Cloudy | 2 mph ESE | 0% |
| Saturday | 100°F | Sunny | 1 to 6 mph ESE | 1% |
| Saturday Night | 77°F | Mostly Clear | 2 to 10 mph ESE | 1% |
| Sunday | 100°F | Mostly Sunny | 2 to 6 mph ESE | 1% |
| Sunday Night | 78°F | Partly Cloudy | 2 to 8 mph ESE | 1% |
| Monday | 100°F | Sunny then Slight Chance Showers And Thunderstorms | 1 to 8 mph ESE | 15% |
| Monday Night | 77°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 1 to 10 mph ESE | 15% |
| Tuesday | 98°F | Sunny then Chance Showers And Thunderstorms | 1 to 9 mph E | 34% |
| Tuesday Night | 78°F | Chance Showers And Thunderstorms then Mostly Clear | 0 to 10 mph E | 34% |
| Wednesday | 97°F | Chance Showers And Thunderstorms | 0 to 9 mph ENE | 47% |
| Wednesday Night | 77°F | Chance Showers And Thunderstorms | 0 to 9 mph ENE | 47% |
| Thursday | 96°F | Chance Rain Showers | 0 to 8 mph ENE | 51% |
| Thursday Night | 76°F | Chance Showers And Thunderstorms | 1 to 8 mph E | 51% |
| Friday | 97°F | Chance Rain Showers | 2 to 9 mph ENE | 33% |
Forecast source: National Weather Service (api.weather.gov) for El Castillo (26.335, -98.639). Updated through the day.
Growing snapshot for El Castillo
Last spring frost
Jan 31
First fall frost
Dec 17
Growing season
321 days
Hardiness zone
10a
More local growing data for El Castillo: nearby ZIP 78548 weather · frost dates · planting calendar · Texas frost dates
Nearby towns & communities
Airport Heights
Alto Bonito Heights
Amada Acres
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B and E
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Benjamin Perez
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Campo Verde
Casa Blanca
Casas
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E. Lopez
East Alto Bonito
El Brazil
El Cenizo
El Chaparral
El Mesquite
El Quiote
El Rancho Vela
El Refugio
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Evergreen
Falcon Heights
Falcon Village
Climate data from the nearest NOAA station, Rio Grande City, Tx (11.9 mi from El Castillo). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.