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Downey 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
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"

Did you know?

  • The highest monthly average temperature in Downey for August is 72 degrees.
  • The lowest monthly average temperature in Downey for December is 56 degrees.
  • The most monthly precipitation in Downey occurs in December with 2.7 inches.
  • The air quality index in Downey is 48% worse than the national average.
  • The pollution index in Downey is 2652% worse than the national average.

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Compare Downey, CA Weather To Other Cities

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 index745550
Pollution index139,490,00018,106,7265,066,862

Downey air quality information

MeasurementTotal
Days measured365
Days with good air quality25
Days with moderate air quality260
Days w/ poor A.Q. for sensitive groups76
Days with unhealthy air quality4

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

City, StatePopulationAir Quality IndexNational Avg.
Alondra Park, CA8,1467448%
Avocado Heights, CA16,1887448%
Bellflower, CA77,6877448%
Buena Park, CA82,7717448%
Commerce, CA12,9977448%
Downey, CA113,2237448%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Arvada, CO113,532548%
Round Rock, TX112,7674118%
Wilmington, NC113,7243922%
Miami Gardens, FL112,5144118%
Costa Mesa, CA112,4398570%
Downey, CA113,2237448%
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.