TODAY MAR28
TEMPERATURE50
HUMIDITY100
PRESSURE
WIND COND.231 1.6
  • 6352Fri70%
  • 5850Sat100%80%
  • 6249Sun60%
  • 6650Mon
  • 7253Tue
daynightWeather update from WHITTIER HILLS at
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Weather Quick Facts

  • The highest monthly average temperature in Downey for August is 72.1 degrees
  • The lowest monthly average temperature in Downey for December is 56.2 degrees
  • The most monthly precipitation in Downey occurs in December with 2.7 inches
  • The air quality index in Downey is 71% worse than the national average
  • The pollution index in Downey is 5017% worse than the national average

Compare Downey, CA Weather

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      Downey 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
      January46°F70°F57°F2.6"
      February48°F70°F58°F2.5"
      March51°F72°F60°F1.0"
      April53°F74°F62°F0.6"
      May57°F75°F65°F0.3"
      June61°F78°F67°F0.0"
      July65°F83°F71°F0.2"
      August65°F85°F72°F0.0"
      September63°F85°F72°F0.3"
      October59°F81°F68°F0.5"
      November52°F76°F62°F0.7"
      December46°F69°F56°F2.7"

      Downey 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.
      IndexDowneyCaliforniaNational
      Air quality index725542
      Pollution index139,490,00010,473,1902,726,193

      Downey air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality66
      Days with moderate air quality208
      Days w/ poor A.Q. for sensitive groups62
      Days with unhealthy air quality28

      Downey air quality information

      PollutantTotal
      Arsenic0.200%
      Benzene0.950%
      Carbon Tetrachloride0.080%
      Lead1.320%
      Mercury0.440%

      Average monthly Downey temperature with heat index

      Downey monthly precipitation with daily maximum

      Downey monthly snow depth with daily maximum

      Downey monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Citrus, CA10,1057244.0%
      Irwindale, CA1,3657244.0%
      Valinda, CA22,6657244.0%
      Florence-Graham, CA64,7877244.0%
      West Athens, CA9,5547244.0%
      Downey, CA111,2637244.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Lowell, MA111,3113726.0%
      Pompano Beach, FL111,2024118.0%
      Centennial, CO111,3315816.0%
      Antioch, CA111,4684510.0%
      Thunder Bay, ON111,499n/a 
      Downey, CA111,2637244.0%
      Source: The Downey, CA 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.