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
65°F
Mostly Clear
Mostly clear, with a low around 65. North wind around 7 mph.
7-day forecast for El Castillo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 65°F | Mostly Clear | 7 mph N | 1% |
| Wednesday | 84°F | Sunny | 6 mph NE | 1% |
| Wednesday Night | 66°F | Mostly Clear | 5 mph E | 2% |
| Thursday | 90°F | Mostly Sunny | 6 mph ESE | 4% |
| Thursday Night | 70°F | Showers And Thunderstorms Likely | 5 mph NNE | 71% |
| Friday | 83°F | Chance Rain Showers then Partly Sunny | 6 to 12 mph N | 35% |
| Friday Night | 65°F | Mostly Cloudy | 2 to 6 mph NNE | 4% |
| Saturday | 79°F | Partly Sunny then Slight Chance Rain Showers | 8 mph NNE | 20% |
| Saturday Night | 61°F | Chance Rain Showers | 5 to 13 mph NNE | 39% |
| Sunday | 73°F | Chance Rain Showers | 8 to 13 mph N | 36% |
| Sunday Night | 57°F | Slight Chance Rain Showers then Mostly Cloudy | 2 to 7 mph N | 15% |
| Monday | 76°F | Mostly Sunny | 6 mph NNE | 5% |
| Monday Night | 57°F | Partly Cloudy | 2 mph ENE | 3% |
| Tuesday | 80°F | Partly Sunny | 1 to 5 mph E | 2% |
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
Anacua
B and E
Barrera
Benjamin Perez
Buena Vista
Camargito
Campo Verde
Casa Blanca
Casas
Chaparrito
Chapeno
Delmita
E. Lopez
East Alto Bonito
El Brazil
El Cenizo
El Chaparral
El Mesquite
El Quiote
El Rancho Vela
El Refugio
El Socio
Escobares
Eugenio Saenz
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 Nov 4, 2026.