TODAY DEC14
TEMPERATURE44
HUMIDITY45
PRESSURE102200
WIND COND.120 11.2
  • 7140Sat
  • 7137Sun
  • 7441Mon
  • 7442Tue
  • 7846Wed
daynightWeather update from Phoenix-Mesa Gateway Airport at
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Weather Quick Facts

  • The highest monthly average temperature in San Tan Valley for July is 92 degrees
  • The lowest monthly average temperature in San Tan Valley for December is 50.7 degrees
  • The most monthly precipitation in San Tan Valley occurs in September with 28.8 inches
  • The air quality index in San Tan Valley is 76% worse than the national average
  • The pollution index in San Tan Valley is 49% worse than the national average

Compare San Tan Valley, AZ Weather

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      San Tan Valley 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
      January39°F66°F51°F4.9"
      February41°F71°F55°F2.3"
      March47°F78°F62°F4.3"
      April53°F86°F70°F1.8"
      May61°F94°F78°F2.3"
      June71°F104°F89°F6.7"
      July80°F105°F92°F6.0"
      August78°F103°F90°F5.5"
      September72°F98°F85°F28.8"
      October58°F88°F73°F1.1"
      November47°F76°F61°F2.4"
      December40°F64°F51°F3.6"

      San Tan Valley 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 Tan ValleyArizonaNational
      Air quality index745742
      Pollution index4,063,3809,766,0192,726,193

      San Tan Valley 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 San Tan Valley temperature with heat index

      San Tan Valley monthly precipitation with daily maximum

      San Tan Valley monthly snow depth with daily maximum

      San Tan Valley monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Queen Creek, AZ52,1627448.0%
      Florence, AZ26,7777448.0%
      Gold Canyon, AZ11,8757448.0%
      Apache Junction, AZ41,8637448.0%
      Queen Valley, AZ6557448.0%
      San Tan Valley, AZ104,9367448.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Clarington, ON104,855n/a 
      Brantford, ON105,103n/a 
      Wichita Falls, TX104,6572648.0%
      Norwalk, CA104,5247244.0%
      Green Bay, WI104,5083628.0%
      San Tan Valley, AZ104,9367448.0%
      Source: The San Tan Valley, 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.