San Antonio Weather in July

Hot weather usually holds steady over San Antonio, Texas throughout July. Summertime also means sunny skies and little rain for the city.

This page gives detailed information on the typical July temperature, precipitation, sun, humidity, wind and storms for San Antonio. The numbers here are historical averages based on climate data gathered at the San Antonio International Airport, located a few miles north of the city center.

Temperature Weather iconTemperature

95 °F July average high 35 °C
75 °F July average low 24 °C
29 days 90 °F max. or more (32 °C)
1 day 70 °F min. or less (21 °C)

Usually every July day is over 80 degrees Fahrenheit (27 degrees Celsius) at San Antonio. The city averages six days this month when the thermometer reaches into the 100s °F (over 38 °C).

July does not normally cool off below 60 °F (16 °C) at night.

Rainy Weather iconRain

2.4 in total precipitation 61 mm
5 days of rain

Half the time, San Antonio receives 0.3 to 3.0 inches (9 to 76 mm) of rainfall in July. One in four years has drier weather, while another one in four is wetter.

Sunny Weather iconSun

74 % sunshine
9 days clear skies

July is one of the sunniest months for San Antonio. The sun's rays reach the ground during 74 percent of daylight hours on average, for a monthly total of 317 hours. Typically on 9 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in July at San Antonio lasts for 13 hours and 48 minutes a day on average. The longest day of the month is the 1st with 14 hours of daylight. By the end of the month, the days have shortened to 13:33 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humid Weather iconHumidity

65 % July average humidity

The relative humidity in San Antonio during July usually peaks at 87 percent in the morning then drops to 44 percent by mid afternoon.

Local Time12 am3 am6 am9 am12 pm3 pm6 pm9 pm
Humidity % 74 83 87 72 53 44 46 61

Windy Weather iconWind

9.1 mph July wind speed average 14.6 kph

July is an average month for wind speed at San Antonio.

Stormy Weather iconStorms

1 day rainfall of 0.5 inches (13 mm) or more
3 days with thunderstorms in July
2 % chance a named storm approaches

There's a 2 percent probability that a named tropical storm will approach within 100 miles (165 km) of San Antonio during July. It's unlikely that any storm in the area will be as severe as a hurricane.


The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals. The named storm probabilities come from the Atlantic Oceanographic and Meteorological Laboratory, Hurricane Research Division.

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