San Antonio, TX Weather & Growing Conditions
Today
98°F
Mostly Sunny
Mostly sunny, with a high near 98. Heat index values as high as 104. Southeast wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 98°F | Mostly Sunny | 5 to 10 mph SE | 6% |
| Tonight | 78°F | Mostly Clear | 5 to 15 mph SE | 6% |
| Wednesday | 99°F | Mostly Sunny | 5 to 10 mph SSE | 2% |
| Wednesday Night | 78°F | Mostly Clear | 5 to 15 mph SE | 1% |
| Thursday | 98°F | Mostly Sunny | 5 to 10 mph SSE | 3% |
| Thursday Night | 78°F | Partly Cloudy | 5 to 10 mph SSE | 3% |
| Friday | 97°F | Mostly Sunny | 5 mph SE | 4% |
| Friday Night | 77°F | Mostly Clear | 0 to 10 mph SE | 5% |
| Saturday | 96°F | Mostly Sunny | 0 to 5 mph SE | 4% |
| Saturday Night | 77°F | Mostly Clear | 5 to 10 mph SE | 3% |
| Sunday | 96°F | Sunny | 0 to 10 mph SSE | 4% |
| Sunday Night | 77°F | Mostly Clear | 5 to 10 mph SSE | 3% |
| Monday | 97°F | Mostly Sunny | 5 to 10 mph SSE | 5% |
| Monday Night | 77°F | Mostly Clear | 10 to 15 mph SSE | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for San Antonio, TX
Last spring frost
Feb 25
First fall frost
Nov 28
Growing season
277 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 Incarnate Word, Tx (3.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.