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July Weather in San Marcos, Mexico

Last updated: August 27, 2025

In San Marcos, Mexico, the average temperature in July hovers around 29°C (85°F), with minimums dipping to 20°C (69°F) and highs soaring up to 40°C (104°F). Expect a precipitation amount of 22 mm (0.9 in) over about 3 days, accompanied by an average humidity level of 73%. Perfect for enjoying the warm, tropical ambiance!

July Temperature in San Marcos

In July in San Marcos, the average temperature is 29°C (85°F). The maximum can reach 40°C (104°F), and the minimum can be as low as 20°C (69°F). Be prepared for warm weather and pack accordingly for both hot days and cooler nights during your travels.

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 29°C (85°F), with highs reaching up to 40°C (104°F) and lows dropping to around 20°C (69°F).
JanFebMarAprMayJunJulAugSepOctNovDec596672798586858580756761
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 22 mm (0.9 in) over a span of 3 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 22 mm (0.9 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec45924122283325511
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 73%. With an average temperature of 29°C (85°F), this humidity feels like a warm blanket enveloping you, making outdoor activities quite uncomfortable and sticky for traveling.

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 73%, 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 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.
JanFebMarAprMayJunJulAugSepOctNovDec710121313131313131187
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 Weather15°C (60°F)4 mm (0.1 inches)70%high
February Weather19°C (67°F)5 mm (0.2 inches)62%very high
March Weather22°C (73°F)9 mm (0.3 inches)53%extreme
April Weather26°C (79°F)2 mm (0.1 inches)48%extreme
May Weather29°C (85°F)4 mm (0.2 inches)52%extreme
June Weather30°C (86°F)12 mm (0.5 inches)64%extreme
July Weather29°C (85°F)22 mm (0.9 inches)73%extreme
August Weather30°C (85°F)8 mm (0.3 inches)71%extreme
September Weather27°C (81°F)33 mm (1.3 inches)82%extreme
October Weather24°C (76°F)24 mm (1.0 inches)83%extreme
November Weather19°C (67°F)5 mm (0.2 inches)82%very high
December Weather16°C (61°F)11 mm (0.4 inches)84%high

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