TODAY OCT09
TEMPERATURE86
HUMIDITY29
PRESSURE101320
WIND COND.80 9.4
  • 9365Wed
  • 9564Thu
  • 9364Fri
  • 9364Sat
  • 9365Sun
daynightWeather update from San Antonio - Kelly Field at
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Weather Quick Facts

  • The highest monthly average temperature in Southwest for August is 85.8 degrees
  • The lowest monthly average temperature in Southwest for January is 53.2 degrees
  • The most monthly precipitation in Southwest occurs in May with 4.4 inches
  • The air quality index in Southwest is 16% worse than the national average
  • The pollution index in Southwest is 787% worse than the national average

Compare San Antonio, TX Weather

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      Southwest 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"

      Southwest 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.
      IndexSouthwestSan AntonioTexas
      Air quality index494952
      Pollution index24,182,70024,182,7002,009,300

      Southwest air quality

      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

      Air quality details

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

      Average monthly Southwest temperature with heat index

      Southwest monthly precipitation with daily maximum

      Southwest monthly snow depth with daily maximum

      Southwest monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Castle Hills, TX4,459492.0%
      Somerset, TX1,821492.0%
      Leon Valley, TX12,279492.0%
      Lackland AFB, TX5,679492.0%
      LaCoste, TX1,936492.0%
      San Antonio, TX1,529,133492.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Philadelphia, PA1,581,531512.0%
      San Diego, CA1,414,5456428.0%
      Phoenix, AZ1,658,4227448.0%
      Calgary, AB1,371,990n/a 
      Dallas, TX1,338,846512.0%
      San Antonio, TX1,529,133492.0%
      Source: The Southwest, 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.