San Antonio, TX Weather & Growing Conditions
Today
99°F
Mostly Sunny
Mostly sunny, with a high near 99. Heat index values as high as 105. Southeast wind 5 to 15 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 99°F | Mostly Sunny | 5 to 15 mph SE | 6% |
| Tonight | 77°F | Mostly Clear | 5 to 15 mph SE | 6% |
| Wednesday | 98°F | Mostly Sunny | 5 to 10 mph SE | 2% |
| Wednesday Night | 77°F | Mostly Clear | 5 to 15 mph SE | 1% |
| Thursday | 98°F | Mostly Sunny | 5 to 10 mph SSE | 3% |
| Thursday Night | 77°F | Mostly Clear | 5 to 15 mph SE | 3% |
| Friday | 97°F | Mostly Sunny | 5 to 10 mph SE | 6% |
| Friday Night | 76°F | Mostly Clear | 0 to 10 mph SE | 7% |
| Saturday | 96°F | Sunny | 0 to 10 mph SE | 4% |
| Saturday Night | 76°F | Mostly Clear | 5 to 10 mph SE | 2% |
| Sunday | 96°F | Sunny | 0 to 10 mph SE | 5% |
| Sunday Night | 76°F | Mostly Clear | 5 to 15 mph SE | 4% |
| Monday | 97°F | Mostly Sunny | 5 to 15 mph SE | 5% |
| Monday Night | 76°F | Mostly Clear | 10 to 15 mph SE | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for San Antonio, TX
Last spring frost
Feb 20
First fall frost
Dec 3
Growing season
291 days
Hardiness zone
9a
Explore more for San Antonio, TX: full frost dates · planting calendar · Texas frost dates
Climate data from the nearest NOAA station, San Antonio Stinson Ap, Tx (9.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.