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July Weather in San Marcos, Mexico

Last updated: August 27, 2025

In San Marcos, Mexico, the average temperature in July is a warm 26°C (80°F), with minimums dipping to 20°C (68°F) and highs reaching up to 34°C (93°F). Expect significant rainfall, with an average precipitation of 230 mm (9.1 in) over 28 days, contributing to a humidity level of 72%.

July Temperature in San Marcos

In July in San Marcos, the average temperature is 26°C (80°F), with maximums reaching 34°C (93°F) and minimums dropping to 20°C (68°F). This makes it an ideal time for travelers seeking warm weather and outdoor activities.

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

The chart illustrates July 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, July typically has an average temperature of 26°C (80°F), with highs reaching up to 34°C (93°F) and lows dropping to around 20°C (68°F).
JanFebMarAprMayJunJulAugSepOctNovDec656771768079798079757066
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.

July Precipitation in San Marcos

In San Marcos in July, the precipitation amount is 230 mm (9.1 in) over a span of 28 days.

July Precipitation Trends in San Marcos

The chart displays monthly precipitation patterns in San Marcos, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In San Marcos, July typically receives around 230 mm (9.1 inches) of precipitation spread over approximately 28 days.
JanFebMarAprMayJunJulAugSepOctNovDec979012213115526323026132633014762
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
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July Humidity in San Marcos

In San Marcos in July, humidity is 72%. With an average temperature of 26°C (80°F), this humidity feels like a warm embrace, making traveling feel a bit heavier, yet invigorating as you navigate the vibrant atmosphere, surrounded by the rich scents and lively sounds of the locale.

July Average Humidity in San Marcos

This chart illustrates the average monthly humidity levels in San Marcos, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in San Marcos is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%86%83%80%82%79%72%74%84%92%91%91%
Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in San Marcos

In San Marcos in July, 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 Marcos.

Maximum UV Index Levels in San Marcos for July

The chart shows the monthly maximum UV Index (UVI) for San Marcos in July, 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 July, the maximum UV index in San Marcos typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec810111213131312121197
Data source: San Marcos July 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 July 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 July’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 July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather18°C (65°F)97 mm (3.8 inches)88%very high
February Weather20°C (68°F)90 mm (3.5 inches)86%very high
March Weather22°C (71°F)122 mm (4.8 inches)83%extreme
April Weather24°C (76°F)131 mm (5.2 inches)80%extreme
May Weather26°C (80°F)155 mm (6.1 inches)82%extreme
June Weather26°C (80°F)263 mm (10.3 inches)79%extreme
July Weather26°C (80°F)230 mm (9.1 inches)72%extreme
August Weather27°C (80°F)261 mm (10.3 inches)74%extreme
September Weather26°C (79°F)326 mm (12.8 inches)84%extreme
October Weather24°C (76°F)330 mm (13.0 inches)92%extreme
November Weather21°C (70°F)147 mm (5.8 inches)91%very high
December Weather19°C (66°F)62 mm (2.4 inches)91%high

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