TODAY OCT31
TEMPERATURE77
HUMIDITY10
PRESSURE101460
WIND COND.280 7.6
  • 8152Fri
  • 8057Sat20%
  • 7250Sun30%20%
  • 7147Mon
  • 7449Tue
daynightWeather update from Phoenix, Phoenix Sky Harbor International Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Southwest for July is 95.9 degrees
  • The lowest monthly average temperature in Southwest for December is 55.5 degrees
  • The most monthly precipitation in Southwest occurs in August with 1.4 inches
  • The air quality index in Southwest is 76% worse than the national average
  • The pollution index in Southwest is 49% worse than the national average

Compare Mesa, AZ 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
      January45°F69°F56°F0.8"
      February48°F74°F60°F0.7"
      March54°F81°F67°F0.5"
      April60°F88°F74°F0.2"
      May68°F96°F83°F0.2"
      June79°F107°F94°F0.0"
      July84°F108°F96°F0.9"
      August83°F107°F94°F1.4"
      September77°F102°F89°F0.8"
      October65°F92°F78°F0.2"
      November54°F80°F66°F0.4"
      December45°F69°F55°F0.9"

      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.
      IndexSouthwestMesaArizona
      Air quality index747457
      Pollution index4,063,3804,063,3809,766,019

      Southwest air quality

      MeasurementTotal
      Days measured365
      Days with good air quality50
      Days with moderate air quality261
      Days w/ poor A.Q. for sensitive groups42
      Days with unhealthy air quality2

      Air quality details

      PollutantTotal
      Arsenic0.004%
      Benzene0.060%
      Carbon Tetrachloride0.010%
      Lead0.040%
      Mercury0.001%

      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.
      Queen Creek, AZ52,1627448.0%
      Guadalupe, AZ6,5727448.0%
      Tempe, AZ191,6077448.0%
      Sun Lakes, AZ14,8877448.0%
      Paradise Valley, AZ14,5027448.0%
      Mesa, AZ508,9187448.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Sacramento, CA503,482524.0%
      Atlanta, GA497,642524.0%
      Fresno, CA526,1476020.0%
      Kansas City, MO491,158476.0%
      Omaha, NE479,5294020.0%
      Mesa, AZ508,9187448.0%
      Source: The Southwest, Mesa, AZ 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.