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August Weather in San Marcos, Mexico

Last updated: August 27, 2025

In August, the average temperature in San Marcos, Mexico is a pleasant 21°C (70°F). Expect a comfortable range, with minimums dipping to 12°C (54°F) and maximums reaching up to 31°C (88°F). The month brings 67 mm (2.6 in) of precipitation spread over about 8 days, while the average humidity hovers around 71%. Enjoy the mix of sunny days and refreshing showers!

August Temperature in San Marcos

In August in San Marcos, the average temperature is 21°C (70°F). Maximums can reach 31°C (88°F), while minimums can drop as low as 12°C (54°F). This pleasant climate makes it an ideal time for exploring outdoor activities and enjoying local attractions.

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

The chart illustrates August temperature patterns in San Marcos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Marcos, August typically has an average temperature of 21°C (70°F), with highs reaching up to 31°C (88°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec545864687272696965645954
Data source: Temperature data for San Marcos 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 Marcos

In San Marcos in August, the total precipitation amount is 67 mm (2.6 in) over the course of 8 days.

August Precipitation Trends in San Marcos

The chart displays monthly precipitation patterns in San Marcos, 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 Marcos, August typically receives around 67 mm (2.6 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec121011915521366712543109
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in San Marcos

In San Marcos in August, humidity is 71%. With an average temperature of 21°C (70°F), this humidity feels like a warm, sticky embrace, making outdoor activities feel slightly heavy and requiring regular breaks to stay refreshed while exploring.

August Average Humidity in San Marcos

This chart illustrates the average monthly humidity levels in San Marcos, 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 Marcos is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec70%62%53%48%52%64%73%71%82%83%82%84%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in San Marcos

In San Marcos 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 Marcos, you can check here.

Maximum UV Index Levels in San Marcos for August

The chart shows the monthly maximum UV Index (UVI) for San Marcos 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 Marcos typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec811131414141414131297
Data source: San Marcos 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 Marcos Compares to Other Months

Weather in San Marcos varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in San Marcos, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in San Marcos, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)12 mm (0.5 inches)70%very high
February Weather15°C (59°F)10 mm (0.4 inches)62%extreme
March Weather18°C (64°F)11 mm (0.4 inches)53%extreme
April Weather20°C (68°F)9 mm (0.4 inches)48%extreme
May Weather22°C (73°F)15 mm (0.6 inches)52%extreme
June Weather22°C (73°F)52 mm (2.1 inches)64%extreme
July Weather20°C (69°F)136 mm (5.4 inches)73%extreme
August Weather21°C (70°F)67 mm (2.6 inches)71%extreme
September Weather18°C (65°F)125 mm (4.9 inches)82%extreme
October Weather18°C (64°F)43 mm (1.7 inches)83%extreme
November Weather15°C (59°F)10 mm (0.4 inches)82%very high
December Weather12°C (55°F)9 mm (0.3 inches)84%high

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