Rio Hondo, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rio Hondo, a city in Cameron County, Texas.
This Afternoon
96°F
Mostly Sunny
Mostly sunny, with a high near 96. Heat index values as high as 108. East wind around 14 mph.
7-day forecast for Rio Hondo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 96°F | Mostly Sunny | 14 mph E | 10% |
| Tonight | 77°F | Mostly Clear | 0 to 13 mph ENE | 4% |
| Saturday | 97°F | Sunny | 1 to 13 mph NE | 11% |
| Saturday Night | 76°F | Mostly Clear | 1 to 13 mph ESE | 0% |
| Sunday | 98°F | Sunny | 1 to 14 mph ESE | 14% |
| Sunday Night | 77°F | Partly Cloudy | 2 to 14 mph SE | 14% |
| Monday | 98°F | Sunny then Slight Chance Showers And Thunderstorms | 1 to 14 mph ESE | 19% |
| Monday Night | 77°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 1 to 14 mph ESE | 19% |
| Tuesday | 98°F | Chance Showers And Thunderstorms | 1 to 14 mph E | 38% |
| Tuesday Night | 78°F | Chance Showers And Thunderstorms then Mostly Clear | 1 to 14 mph E | 38% |
| Wednesday | 97°F | Chance Showers And Thunderstorms | 2 to 15 mph ENE | 37% |
| Wednesday Night | 78°F | Chance Showers And Thunderstorms then Mostly Clear | 2 to 14 mph E | 37% |
| Thursday | 97°F | Chance Showers And Thunderstorms | 2 to 15 mph ENE | 38% |
| Thursday Night | 77°F | Chance Showers And Thunderstorms | 5 to 14 mph ENE | 38% |
Forecast source: National Weather Service (api.weather.gov) for Rio Hondo (26.235, -97.581). Updated through the day.
Growing snapshot for Rio Hondo
Last spring frost
Jan 8
First fall frost
Dec 29
Growing season
357 days
Hardiness zone
10a
More local growing data for Rio Hondo: nearby ZIP 78550 weather · frost dates · planting calendar · Texas frost dates
Nearby towns & communities
Arroyo Colorado Estates
Arroyo Gardens
Bayview
Bixby
Bluetown
Brownsville
Cameron Park
Chula Vista
Combes
Del Mar Heights
El Camino Angosto
Encantada-Ranchito-El Calaboz
Green Valley Farms
Harlingen
Iglesia Antigua
Indian Lake
Juarez
La Feria
La Feria North
La Paloma
La Tina Ranch
Lago
Laguna Heights
Laguna Vista
Las Palmas II
Lasana
Laureles
Los Fresnos
Los Indios
Lozano
Climate data from the nearest NOAA station, Harlingen Rio Grande Ap, Tx (2 mi from Rio Hondo). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.