nomadseason

July Weather in San Antonio, United States

Last updated: June 24, 2025

In San Antonio, United States, the average temperature in July is a warm 27°C (81°F). While the mercury can drop to a comfortable 22°C (71°F), it can also soar to a sizzling 35°C (95°F). Be prepared for some rain, as 276 mm (10.8 in) of precipitation falls over 27 days, contributing to an average humidity of 79%.

July Temperature in San Antonio

In July in San Antonio, the average temperature is 27°C (81°F). The maximum can reach 35°C (95°F), while the minimum can be as low as 22°C (71°F). This climate makes San Antonio an ideal destination for travelers seeking warm and pleasant weather.

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 27°C (81°F), with highs reaching up to 35°C (95°F) and lows dropping to around 22°C (71°F).
JanFebMarAprMayJunJulAugSepOctNovDec606668737880818281776863
Data source: Temperature data for San Antonio generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

July Precipitation in San Antonio

In San Antonio in July, the total precipitation amount is 276 mm (10.8 in) spread over 27 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 276 mm (10.8 inches) of precipitation spread over approximately 27 days.
JanFebMarAprMayJunJulAugSepOctNovDec43692077123223276247189824970
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

July Humidity in San Antonio

In San Antonio in July, humidity is 79%. With an average temperature of 27°C (81°F), this humidity feels like a warm and sticky embrace, making travel both challenging and invigorating as the air clings to your skin, urging you to seek shade or a refreshing drink.

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 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%80%75%70%68%75%80%81%83%81%82%84%
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 is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. 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 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec689111112121111975
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.
 TemperaturePrecipitationHumidityUV
January Weather16°C (60°F)43 mm (1.7 inches)83%high
February Weather19°C (66°F)69 mm (2.7 inches)80%very high
March Weather20°C (68°F)20 mm (0.8 inches)75%very high
April Weather23°C (73°F)77 mm (3.0 inches)70%extreme
May Weather25°C (78°F)123 mm (4.8 inches)68%extreme
June Weather27°C (81°F)223 mm (8.8 inches)75%extreme
July Weather27°C (81°F)276 mm (10.8 inches)79%extreme
August Weather28°C (82°F)247 mm (9.7 inches)81%extreme
September Weather27°C (81°F)189 mm (7.4 inches)83%extreme
October Weather25°C (77°F)82 mm (3.2 inches)81%very high
November Weather20°C (68°F)49 mm (1.9 inches)82%high
December Weather17°C (64°F)70 mm (2.8 inches)84%moderate

Compare San Antonio's Climate with Cities Worldwide