TODAY SEP27
TEMPERATURE70
HUMIDITY76
PRESSURE29.86
WIND COND.170 5.4
  • 8264Sun
  • 9264Mon
  • 9868Tue
  • 9867Wed
  • 9767Thu
daynightWeather update from Fullerton, Fullerton Municipal Airport at

Key findings

  • The highest monthly average temperature in Northwest for August is 75 degrees
  • The lowest monthly average temperature in Northwest for December is 56 degrees
  • The most monthly precipitation in Northwest occurs in December with 2.5 inches
  • The air quality index in Northwest is 45% worse than the national average
  • The pollution index in Northwest is 83% better than the national average

Compare Anaheim, CA Weather

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      Northwest 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"

      Northwest 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.
      IndexNorthwestAnaheimCalifornia
      Air quality index728955
      Pollution index858,652858,65218,106,726

      Northwest air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality42
      Days with moderate air quality178
      Days w/ poor A.Q. for sensitive groups79
      Days with unhealthy air quality58

      Northwest air quality information

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

      Average monthly Northwest temperature with heat index

      Northwest monthly precipitation with daily maximum

      Northwest monthly snow depth with daily maximum

      Northwest monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Avocado Heights, CA16,1887244%
      Commerce, CA12,9977244%
      East Whittier, CA10,4357244%
      Hacienda Heights, CA54,0337244%
      Industry, CA2667244%
      Anaheim, CA346,7768978%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Honolulu, HI349,5973040%
      Aurora, CO351,1315816%
      Santa Ana, CA333,6058978%
      Tampa, FL361,4774314%
      Bakersfield, CA367,5556734%
      Anaheim, CA346,7768978%
      Source: The Northwest, Anaheim, 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.