Sullivan City, TX Weather & Growing Conditions
Today
100°F
Sunny
Sunny, with a high near 100. Heat index values as high as 110. Southeast wind 9 to 15 mph, with gusts as high as 26 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 100°F | Sunny | 9 to 15 mph SE | 1% |
| Tonight | 79°F | Mostly Clear | 9 to 16 mph SE | 2% |
| Wednesday | 100°F | Mostly Sunny | 9 to 14 mph SE | 1% |
| Wednesday Night | 79°F | Mostly Clear | 7 to 14 mph SE | 0% |
| Thursday | 100°F | Sunny | 7 to 13 mph SE | 7% |
| Thursday Night | 78°F | Mostly Clear | 7 to 14 mph SE | 7% |
| Friday | 99°F | Sunny | 6 to 12 mph SE | 8% |
| Friday Night | 78°F | Mostly Clear | 5 to 13 mph SE | 8% |
| Saturday | 99°F | Sunny | 3 to 10 mph ESE | 4% |
| Saturday Night | 78°F | Mostly Clear | 5 to 13 mph SE | 4% |
| Sunday | 99°F | Sunny | 3 to 10 mph SE | 5% |
| Sunday Night | 79°F | Mostly Clear | 8 to 13 mph SE | 5% |
| Monday | 100°F | Sunny | 7 to 14 mph SE | 2% |
| Monday Night | 79°F | Mostly Clear | 15 mph SE | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sullivan City, TX
Last spring frost
Jan 23
First fall frost
Dec 28
Growing season
340 days
Hardiness zone
10a
Explore more for Sullivan City, TX: full frost dates · planting calendar · Texas frost dates
Climate data from the nearest NOAA station, La Joya, Tx (13.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.