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. South southeast wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 98°F | Mostly Sunny | 5 to 10 mph SSE | 5% |
| Tonight | 77°F | Mostly Clear | 5 to 15 mph SSE | 5% |
| Wednesday | 98°F | Mostly Sunny | 5 to 10 mph SSE | 2% |
| Wednesday Night | 77°F | Partly Cloudy | 5 to 15 mph SSE | 1% |
| Thursday | 98°F | Mostly Sunny | 5 to 10 mph SSE | 3% |
| Thursday Night | 77°F | Partly Cloudy | 5 to 15 mph SSE | 4% |
| Friday | 97°F | Mostly Sunny | 5 to 10 mph SSE | 3% |
| Friday Night | 76°F | Partly Cloudy | 5 to 10 mph SSE | 4% |
| Saturday | 95°F | Mostly Sunny | 0 to 5 mph SSE | 3% |
| Saturday Night | 76°F | Mostly Clear | 5 to 10 mph SE | 3% |
| Sunday | 95°F | Sunny | 5 to 10 mph SSE | 4% |
| Sunday Night | 76°F | Mostly Clear | 5 to 10 mph SSE | 4% |
| Monday | 97°F | Mostly Sunny | 5 to 15 mph SSE | 4% |
| Monday Night | 77°F | Mostly Clear | 10 to 15 mph SSE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for San Antonio, TX
Last spring frost
Feb 26
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 Intl Ap, Tx (5.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.