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August Weather in San Antonio, Mexico

Last updated: August 26, 2025

In San Antonio, Mexico, the average temperature in August hovers around 28°C (82°F), with minimums dipping to 24°C (75°F) and soaring to maximums of 33°C (92°F). Expect a substantial precipitation of 284 mm (11.2 in) spread over about 20 days, contributing to an average humidity level of 82%. Stay prepared for a warm and wet month!

August Temperature in San Antonio

In August in San Antonio, the average temperature is 28°C (82°F), with a maximum reaching 33°C (92°F) and a minimum dipping to 24°C (75°F). This pleasant climate makes it an ideal time for travelers to enjoy outdoor activities and explore the local attractions.

August Weather in San Antonio: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in San Antonio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Antonio, August typically has an average temperature of 28°C (82°F), with highs reaching up to 33°C (92°F) and lows dropping to around 24°C (75°F).
JanFebMarAprMayJunJulAugSepOctNovDec807980818282838281818180
Data source: Temperature data for San Antonio generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in San Antonio

In San Antonio in August, the precipitation amount reaches 284 mm (11.2 in) over the course of 20 days.

August Precipitation Trends in San Antonio

The chart displays monthly precipitation patterns in San Antonio, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In San Antonio, August typically receives around 284 mm (11.2 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec210113235952842992133717
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in San Antonio

In San Antonio in August humidity is 82%. With an average temperature of 28°C (82°F), this humidity feels like walking through a warm, dense blanket, making outdoor activities a challenge and necessitating frequent breaks to stay hydrated.

August Average Humidity in San Antonio

This chart illustrates the average monthly humidity levels in San Antonio, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in San Antonio is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec65%61%59%62%73%78%79%82%82%79%72%70%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in San Antonio

In San Antonio in August, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in San Antonio.

Maximum UV Index Levels in San Antonio for August

The chart shows the monthly maximum UV Index (UVI) for San Antonio in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In August, the maximum UV index in San Antonio typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911131313141313131198
Data source: San Antonio August UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How August Weather in San Antonio Compares to Other Months

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.

This table compares monthly weather conditions in San Antonio, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (80°F)2 mm (0.1 inches)65%very high
February Weather26°C (80°F)1 mm (0.0 inches)61%extreme
March Weather27°C (80°F)0 mm (0.0 inches)59%extreme
April Weather27°C (81°F)1 mm (0.0 inches)62%extreme
May Weather28°C (82°F)13 mm (0.5 inches)73%extreme
June Weather28°C (82°F)235 mm (9.3 inches)78%extreme
July Weather28°C (83°F)95 mm (3.8 inches)79%extreme
August Weather28°C (82°F)284 mm (11.2 inches)82%extreme
September Weather27°C (81°F)299 mm (11.8 inches)82%extreme
October Weather27°C (81°F)212 mm (8.4 inches)79%extreme
November Weather27°C (81°F)37 mm (1.5 inches)72%very high
December Weather27°C (80°F)17 mm (0.7 inches)70%very high

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