Last updated: March 2, 2024
The weather in San Antonio, United States, during August is characterized by an average temperature of 28°C (82°F). Highs can soar to 34°C (94°F), while lows may dip to 23°C (73°F). Typically, the humidity level in San Antonio throughout August hovers around 81%.
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Average temperature
Maximum temperature
Humidity
In August, San Antonio averages 247 mm (9.7 inches) of rainfall, typically over the course of 28 rainy days. The month enjoys an average of 13 hours 5 minutes of daylight, with the sun shining for approximately 10 hours 10 minutes each day. Additionally, there is a 15% probability of sunny days during this period.
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Rainy days
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Chance of sun
In August, the UV Index in San Antonio reaches a maximum of 11, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 10 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 1 | 1 | 2 | 4 | 7 | 10 | 11 | 11 | 9 | 7 | 4 | 2 | 1 |
| Exposure | Low | Moderate | High | VeryHigh | Extreme | VeryHigh | High | Moderate | Low | ||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 10 min | 15 min | 25 min | 30 min | 45 min | ||||