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.
|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.
|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.
|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.
|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 Time||12 am||3 am||6 am||9 am||12 pm||3 pm||6 pm||9 pm|
|9.1 mph||July wind speed average||14.6 kph|
July is an average month for wind speed at San Antonio.
|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.