TODAY MAY30
TEMPERATURE67
HUMIDITY63
PRESSURE29.99
WIND COND. 3.4
  • 8360Sun
  • 8461Mon
  • 8661Tue
  • 8560Wed
  • 8162Thu
daynightWeather update from Fullerton, Fullerton Municipal Airport at
How would you rate the weather in Fullerton?
Write a review to give others more information about this area.
How would you rate the air quality in Fullerton?
Write a review to give others more information about this area.
See all Fullerton poll results

Fullerton 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°F72°F57°F2.3"
February48°F72°F58°F1.7"
March51°F75°F61°F1.0"
April54°F76°F64°F0.5"
May58°F78°F66°F0.3"
June62°F81°F70°F0.0"
July66°F86°F74°F0.1"
August66°F88°F75°F0.0"
September65°F88°F74°F0.2"
October59°F83°F69°F0.4"
November52°F77°F63°F0.6"
December45°F70°F56°F2.5"

Did you know?

  • The highest monthly average temperature in Fullerton for August is 75 degrees.
  • The lowest monthly average temperature in Fullerton for December is 56 degrees.
  • The most monthly precipitation in Fullerton occurs in December with 2.5 inches.
  • The air quality index in Fullerton is 49% worse than the national average.
  • The pollution index in Fullerton is 83% better than the national average.

Compare Fullerton, CA Weather To Other Cities

      vs

      Fullerton 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.
      IndexFullertonCaliforniaNational
      Air quality index745550
      Pollution index858,65218,106,7265,066,862

      Fullerton 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

      Fullerton air quality information

      PollutantTotal
      Arsenic0.002%
      Benzene0.010%
      Carbon Tetrachloride0.000%
      Lead0.020%
      Mercury0.001%

      Average monthly Fullerton temperature with heat index

      Fullerton monthly precipitation with daily maximum

      Fullerton monthly snow depth with daily maximum

      Fullerton monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Avocado Heights, CA16,1887448%
      Bell Gardens, CA42,8057448%
      Downey, CA113,2237448%
      Fountain Valley, CA56,6707448%
      Industry, CA2667448%
      Fullerton, CA139,4917448%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Orange, CA139,9198570%
      Killeen, TX138,7453628%
      Pasadena, CA140,2687448%
      McAllen, TX138,4753628%
      Dayton, OH141,143484%
      Fullerton, CA139,4917448%
      Source: The Fullerton, 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.