Weather in San Antonio in August
August in San Antonio is warm with average temperatures around 30.0°C (86.0°F). Moderate rainfall of 62mm spread over 7 days.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
36.1°C
97.0°F
Low
23.9°C
75.0°F
Precipitation
62 mm
2.4 inches
~7 rainy days
Conditions
Humidity
61%
Comparison to Adjacent Months
August is 3.5°C warmer than September, 34mm drier than September.