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Southwest Average Weather

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
January22°F88°F55°F0.8"
February23°F93°F59°F0.6"
March30°F96°F66°F3.1"
April36°F102°F72°F1.3"
May50°F102°F79°F3.1"
June61°F105°F85°F2.2"
July67°F106°F85°F3.1"
August70°F104°F86°F1.6"
September55°F108°F81°F2.1"
October34°F97°F72°F2.5"
November28°F93°F64°F1.7"
December21°F84°F55°F1.0"

Did you know?

  • The highest monthly average temperature in Southwest for August is 86 degrees.
  • The lowest monthly average temperature in Southwest for December is 55 degrees.
  • The most monthly precipitation in Southwest occurs in March with 3.1 inches.
  • The air quality index in Southwest is 9% better than the national average.
  • The pollution index in Southwest is 377% worse than the national average.

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Compare San Antonio, TX Weather To Other Cities

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 index454552
Pollution index24,182,70024,182,7004,642,916

Southwest air quality information

MeasurementTotal
Days measured365
Days with good air quality249
Days with moderate air quality106
Days w/ poor A.Q. for sensitive groups10
Days with unhealthy air quality

Southwest air quality information

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

City, StatePopulationAir Quality IndexNational Avg.
Balcones Heights, TX3,0174510%
LaCoste, TX1,1884510%
Olmos Park, TX1,9644510%
Von Ormy, TX1,0554510%
Castle Hills, TX4,3674510%
San Antonio, TX1,439,3584510%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
San Diego, CA1,374,8126122%
Phoenix, AZ1,555,3247448%
Philadelphia, PA1,559,9385714%
Dallas, TX1,278,433548%
San Jose, CA1,009,363484%
San Antonio, TX1,439,3584510%
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.