Last updated: August 27, 2025
In San Antonio, Mexico, the average temperature in August hovers around 20°C (67°F), with lows reaching 11°C (52°F) and highs climbing up to 32°C (89°F). You can expect 77 mm (3.0 in) of precipitation over 12 days, contributing to an average humidity of 68%. Whether you're planning your visit or simply curious about the climate, these stats provide a glimpse into the weather of this vibrant location!
In August in San Antonio, the average temperature is 20°C (67°F). Maximums can reach 32°C (89°F), while minimums can drop to as low as 11°C (52°F). This pleasant climate makes San Antonio an ideal destination for outdoor activities and exploration during this time of year.
In San Antonio in August, the precipitation amount is 77 mm (3.0 in) spread over 12 days.
In San Antonio in August humidity is 68%. With an average temperature of 20°C (67°F), this humidity feels like walking through a warm, heavy blanket, making travel a bit sweltering and causing you to crave frequent breaks in the shade.
In San Antonio in August, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Antonio, you can check here.
UV Risk Categories
Weather in San Antonio varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in San Antonio, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 13°C (55°F) | 7 mm (0.3 inches) | 74% | very high |
| February Weather | 15°C (60°F) | 10 mm (0.4 inches) | 65% | extreme |
| March Weather | 18°C (64°F) | 14 mm (0.5 inches) | 58% | extreme |
| April Weather | 20°C (68°F) | 9 mm (0.4 inches) | 58% | extreme |
| May Weather | 21°C (71°F) | 45 mm (1.8 inches) | 67% | extreme |
| June Weather | 20°C (68°F) | 120 mm (4.7 inches) | 76% | extreme |
| July Weather | 19°C (67°F) | 106 mm (4.2 inches) | 67% | extreme |
| August Weather | 20°C (67°F) | 77 mm (3.0 inches) | 68% | extreme |
| September Weather | 18°C (65°F) | 121 mm (4.8 inches) | 81% | extreme |
| October Weather | 17°C (63°F) | 63 mm (2.5 inches) | 83% | extreme |
| November Weather | 15°C (58°F) | 23 mm (0.9 inches) | 84% | very high |
| December Weather | 13°C (55°F) | 7 mm (0.3 inches) | 81% | very high |