Sullivan City, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sullivan City, a city in Hidalgo County, Texas.
Tonight
66°F
Partly Cloudy
Partly cloudy, with a low around 66. North wind around 7 mph.
7-day forecast for Sullivan City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 66°F | Partly Cloudy | 7 mph N | 8% |
| Wednesday | 86°F | Mostly Sunny | 6 mph NE | 1% |
| Wednesday Night | 68°F | Partly Cloudy | 5 mph E | 3% |
| Thursday | 92°F | Mostly Sunny | 3 to 7 mph ESE | 5% |
| Thursday Night | 71°F | Showers And Thunderstorms Likely | 2 to 7 mph NNE | 67% |
| Friday | 83°F | Chance Showers And Thunderstorms then Partly Sunny | 6 to 12 mph N | 35% |
| Friday Night | 64°F | Partly Cloudy then Slight Chance Rain Showers | 2 to 6 mph NNE | 18% |
| Saturday | 79°F | Chance Rain Showers | 6 to 9 mph N | 36% |
| Saturday Night | 61°F | Chance Rain Showers | 5 to 12 mph N | 33% |
| Sunday | 77°F | Slight Chance Rain Showers then Mostly Sunny | 6 to 12 mph N | 15% |
| Sunday Night | 57°F | Partly Cloudy | 1 to 5 mph N | 12% |
| Monday | 79°F | Mostly Sunny | 1 to 6 mph NNE | 4% |
| Monday Night | 58°F | Partly Cloudy | 2 mph E | 2% |
| Tuesday | 83°F | Mostly Sunny | 2 to 6 mph ESE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Sullivan City (26.275, -98.564). Updated through the day.
Growing snapshot for Sullivan City
Last spring frost
Jan 23
First fall frost
Dec 28
Growing season
340 days
Hardiness zone
10a
More local growing data for Sullivan City: nearby ZIP 78565 weather · frost dates · planting calendar · Texas frost dates
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Climate data from the nearest NOAA station, La Joya, Tx (15.7 mi from Sullivan City). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.