San Fernando, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Fernando, a community in Starr County, Texas.
Overnight
64°F
Clear
Clear, with a low around 64. North wind around 3 mph.
7-day forecast for San Fernando
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 64°F | Clear | 3 mph N | 0% |
| Wednesday | 84°F | Sunny | 3 mph NE | 0% |
| Wednesday Night | 66°F | Mostly Clear | 3 mph E | 2% |
| Thursday | 89°F | Mostly Sunny | 1 to 5 mph ESE | 7% |
| Thursday Night | 70°F | Showers And Thunderstorms Likely | 0 to 5 mph N | 69% |
| Friday | 82°F | Chance Rain Showers then Partly Sunny | 3 to 8 mph N | 31% |
| Friday Night | 64°F | Mostly Cloudy | 0 to 3 mph N | 4% |
| Saturday | 78°F | Partly Sunny then Slight Chance Rain Showers | 6 mph NNE | 20% |
| Saturday Night | 61°F | Chance Rain Showers | 3 to 9 mph NNE | 40% |
| Sunday | 73°F | Chance Rain Showers | 5 to 10 mph N | 35% |
| Sunday Night | 56°F | Slight Chance Rain Showers then Mostly Cloudy | 0 to 3 mph N | 15% |
| Monday | 76°F | Mostly Sunny | 1 to 5 mph NNE | 5% |
| Monday Night | 56°F | Partly Cloudy | 0 mph | 3% |
| Tuesday | 80°F | Partly Sunny | 0 to 3 mph E | 3% |
Forecast source: National Weather Service (api.weather.gov) for San Fernando (26.403, -98.835). Updated through the day.
Growing snapshot for San Fernando
Last spring frost
Jan 31
First fall frost
Dec 17
Growing season
321 days
Hardiness zone
9b
More local growing data for San Fernando: nearby ZIP 78582 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 Castillo
El Cenizo
El Chaparral
El Mesquite
El Quiote
El Rancho Vela
El Refugio
El Socio
Escobares
Eugenio Saenz
Evergreen
Falcon Heights
Climate data from the nearest NOAA station, Rio Grande City, Tx (11.5 mi from San Fernando). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.