July Weather in San Antonio, Mexico

Last updated: August 27, 2025

In July, the average temperature in San Antonio, Mexico hovers around 18°C (65°F), with a minimum of 12°C (54°F) and a maximum of 26°C (78°F). Expect 210 mm (8.3 in) of precipitation spread over 28 days, contributing to a fairly high average humidity of 81%. Prepare for a mix of comfortable warmth and occasional showers.

July Temperature in San Antonio

In July in San Antonio, the average temperature is 18°C (65°F). Maximum temperatures can reach 26°C (78°F), while minimums can drop to as low as 12°C (54°F). This mild climate makes San Antonio a great destination for travelers seeking pleasant weather conditions.

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

The chart illustrates July 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, July typically has an average temperature of 18°C (65°F), with highs reaching up to 26°C (78°F) and lows dropping to around 12°C (54°F).

Data source: Temperature data for San Antonio generated using information from the Copernicus Climate Change Service.

July Precipitation in San Antonio

In San Antonio in July, the precipitation amount is 210 mm (8.3 in) spread over 28 days.

July Precipitation Trends in San Antonio

The chart displays monthly precipitation patterns in San Antonio, 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 Antonio, July typically receives around 210 mm (8.3 inches) of precipitation spread over approximately 28 days.

Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

July Humidity in San Antonio

In San Antonio in July, humidity is 81%. With an average temperature of 18°C (65°F), this humidity feels like a thick blanket wrapping around you, making every step feel heavier and the air thick and sultry—a challenging environment for traveling.

July Average Humidity in San Antonio

This chart illustrates the average monthly humidity levels in San Antonio, 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 Antonio is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in San Antonio

In San Antonio in July, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in San Antonio.

Maximum UV Index Levels in San Antonio for July

The chart shows the monthly maximum UV Index (UVI) for San Antonio 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 Antonio typically reaches 15, which falls under the extreme exposure category.

Data source: San Antonio 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 Antonio Compares to Other Months

Weather in San Antonio varies notably across the year, with each month offering distinct climate conditions. This page compares July’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 July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (55°F)	88 mm (3.5 inches)	88%	very high
February Weather	15°C (58°F)	64 mm (2.5 inches)	86%	extreme
March Weather	16°C (61°F)	93 mm (3.7 inches)	84%	extreme
April Weather	18°C (65°F)	133 mm (5.2 inches)	81%	extreme
May Weather	19°C (67°F)	190 mm (7.5 inches)	82%	extreme
June Weather	19°C (66°F)	262 mm (10.3 inches)	81%	extreme
July Weather	18°C (65°F)	210 mm (8.3 inches)	81%	extreme
August Weather	18°C (65°F)	291 mm (11.4 inches)	82%	extreme
September Weather	18°C (65°F)	339 mm (13.3 inches)	86%	extreme
October Weather	17°C (63°F)	217 mm (8.5 inches)	90%	extreme
November Weather	15°C (59°F)	111 mm (4.4 inches)	91%	very high
December Weather	13°C (57°F)	51 mm (2.0 inches)	91%	very high