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Key findings

  • The highest monthly average temperature in San Antonio for August is 86 degrees
  • The lowest monthly average temperature in San Antonio for January is 53 degrees
  • The most monthly precipitation in San Antonio occurs in May with 4.4 inches
  • The air quality index in San Antonio is 1% better than the national average
  • The pollution index in San Antonio is 377% worse than the national average

Compare San Antonio, TX Weather

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      San Antonio Average Temperature

      In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
      MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
      January42°F67°F53°F2.4"
      February47°F71°F57°F1.2"
      March54°F78°F64°F2.5"
      April60°F84°F71°F2.4"
      May67°F89°F77°F4.4"
      June73°F95°F83°F1.8"
      July75°F97°F84°F2.3"
      August75°F99°F86°F2.9"
      September71°F93°F81°F3.2"
      October62°F86°F73°F2.4"
      November53°F76°F63°F1.5"
      December45°F67°F55°F1.8"

      San Antonio air quality index & pollution index

      In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
      IndexSan AntonioTexasNational
      Air quality index495250
      Pollution index24,182,7004,642,9165,066,862

      San Antonio air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality196
      Days with moderate air quality163
      Days w/ poor A.Q. for sensitive groups5
      Days with unhealthy air quality1

      San Antonio air quality information

      PollutantTotal
      Arsenic0.310%
      Benzene0.310%
      Carbon Tetrachloride0.080%
      Lead0.140%
      Mercury0.230%

      Average monthly San Antonio temperature with heat index

      San Antonio monthly precipitation with daily maximum

      San Antonio monthly snow depth with daily maximum

      San Antonio monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Balcones Heights, TX3,017492%
      Elmendorf, TX1,596492%
      Hill Country Village, TX751492%
      Leon Valley, TX10,990492%
      Randolph AFB, TX1,123492%
      San Antonio, TX1,439,358492%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      San Diego, CA1,374,8126428%
      Phoenix, AZ1,555,3247448%
      Philadelphia, PA1,559,938512%
      Dallas, TX1,278,433512%
      San Jose, CA1,009,3634314%
      San Antonio, TX1,439,358492%
      Source: The San Antonio, TX weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.