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Key findings

  • The highest monthly average temperature in Northwest for September is 68 degrees
  • The lowest monthly average temperature in Northwest for December is 55 degrees
  • The most monthly precipitation in Northwest occurs in February with 3.8 inches
  • The air quality index in Northwest is 29% worse than the national average
  • The pollution index in Northwest is 804% worse than the national average

Compare Chula Vista, 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
      January48°F64°F55°F2.8"
      February49°F64°F56°F3.8"
      March51°F65°F58°F0.1"
      April53°F66°F59°F0.0"
      May57°F67°F62°F1.5"
      June60°F68°F63°F0.0"
      July63°F72°F67°F0.0"
      August64°F73°F68°F0.0"
      September63°F74°F68°F0.3"
      October58°F72°F64°F0.0"
      November53°F69°F60°F0.1"
      December48°F64°F55°F1.5"

      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.
      IndexNorthwestChula VistaCalifornia
      Air quality index646455
      Pollution index45,820,50045,820,50018,106,726

      Northwest air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality87
      Days with moderate air quality253
      Days w/ poor A.Q. for sensitive groups23
      Days with unhealthy air quality2

      Northwest air quality information

      PollutantTotal
      Arsenic1.130%
      Benzene0.410%
      Carbon Tetrachloride0.030%
      Lead0.600%
      Mercury0.080%

      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.
      Bonita, CA12,8856428%
      Crest, CA2,7336428%
      Imperial Beach, CA27,1806428%
      Lemon Grove, CA26,4216428%
      Spring Valley CDP (Lake County), CA1,1546428%
      Chula Vista, CA260,5986428%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Fort Wayne, IN260,9544510%
      Jersey City, NJ261,666512%
      Buffalo, NY258,9893922%
      Orlando, FL263,3063922%
      St. Petersburg, FL253,5854314%
      Chula Vista, CA260,5986428%
      Source: The Northwest, Chula Vista, 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.