Rio Grande City, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rio Grande City, a city in Starr County, Texas.
Overnight
65°F
Clear
Clear, with a low around 65. North northwest wind around 3 mph.
7-day forecast for Rio Grande City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 65°F | Clear | 3 mph NNW | 0% |
| Wednesday | 85°F | Sunny | 3 mph NE | 1% |
| Wednesday Night | 66°F | Mostly Clear | 0 to 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 | 83°F | Chance Rain Showers then Partly Sunny | 3 to 9 mph N | 32% |
| Friday Night | 64°F | Mostly Cloudy | 0 to 3 mph N | 4% |
| Saturday | 79°F | Mostly Cloudy then Slight Chance Rain Showers | 6 mph NNE | 20% |
| Saturday Night | 61°F | Chance Rain Showers | 3 to 9 mph N | 40% |
| Sunday | 73°F | Chance Rain Showers | 5 to 10 mph N | 35% |
| Sunday Night | 57°F | Slight Chance Rain Showers then Mostly Cloudy | 0 to 3 mph N | 15% |
| Monday | 76°F | Mostly Sunny | 3 mph N | 6% |
| Monday Night | 56°F | Partly Cloudy | 0 mph | 4% |
| Tuesday | 80°F | Partly Sunny | 0 to 3 mph E | 3% |
Forecast source: National Weather Service (api.weather.gov) for Rio Grande City (26.381, -98.821). Updated through the day.
Growing snapshot for Rio Grande City
Last spring frost
Jan 31
First fall frost
Dec 17
Growing season
321 days
Hardiness zone
9b
More local growing data for Rio Grande City: nearby ZIP 78547 weather · frost dates · planting calendar · Texas frost dates
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Climate data from the nearest NOAA station, Rio Grande City, Tx (8.7 mi from Rio Grande City). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.