Last updated: August 22, 2025
In August, the average temperature in San Antonio, Chile hovers around 10°C (51°F), with a minimum of 3°C (37°F) and a maximum reaching 21°C (71°F). Be prepared for some rain, as 38 mm (1.5 in) of precipitation can be expected over about 4 days. With an average humidity level of 73%, you may feel the air a bit heavy, but the mild temperatures make for a pleasant experience overall!
In August in San Antonio, the average temperature is 10°C (51°F), with a maximum that can reach 21°C (71°F) and a minimum that can drop as low as 3°C (37°F). This makes it a great time to explore San Antonio, so be sure to dress in layers to comfortably enjoy the pleasant days and cooler evenings.
In San Antonio in August, the total precipitation amount is 38 mm (1.5 in) spread over the course of 4 days.
In San Antonio in August, humidity is 73%. With an average temperature of 10°C (51°F), this humidity feels like a chilly dampness that can make outdoor activities uncomfortable, causing your clothes to cling to your skin and a persistent coolness that seeps into your bones, which might deter long excursions without proper layering.
In San Antonio in August, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in San Antonio, you can refer to this Hourly UV Index in San Antonio.
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 | 17°C (62°F) | 6 mm (0.2 inches) | 41% | extreme |
| February Weather | 17°C (62°F) | 3 mm (0.1 inches) | 41% | extreme |
| March Weather | 16°C (60°F) | 3 mm (0.1 inches) | 46% | extreme |
| April Weather | 14°C (57°F) | 9 mm (0.4 inches) | 52% | very high |
| May Weather | 12°C (54°F) | 43 mm (1.7 inches) | 64% | moderate |
| June Weather | 11°C (51°F) | 107 mm (4.2 inches) | 71% | moderate |
| July Weather | 10°C (50°F) | 47 mm (1.9 inches) | 75% | moderate |
| August Weather | 10°C (51°F) | 38 mm (1.5 inches) | 73% | high |
| September Weather | 11°C (53°F) | 16 mm (0.6 inches) | 56% | very high |
| October Weather | 13°C (55°F) | 14 mm (0.6 inches) | 61% | extreme |
| November Weather | 15°C (59°F) | 3 mm (0.1 inches) | 52% | extreme |
| December Weather | 16°C (61°F) | 1 mm (0.0 inches) | 39% | extreme |