TODAY MAR02
TEMPERATURE65
HUMIDITY36
PRESSURE29.91
WIND COND.260 8
  • 6149Wed80%60%
  • 6548Thu
  • 7050Fri
  • 6349Sat
  • 6349Sun
daynightWeather update from EW3219 National City at

Key findings

  • The highest monthly average temperature in National City for August is 72 degrees
  • The lowest monthly average temperature in National City for January is 58 degrees
  • The most monthly precipitation in National City occurs in December with 2.3 inches
  • The air quality index in National City is 29% worse than the national average
  • The pollution index in National City is 804% worse than the national average

Compare National City, CA Weather

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      National City 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
      January49°F68°F58°F2.0"
      February51°F68°F59°F1.8"
      March54°F69°F61°F1.1"
      April56°F70°F63°F0.6"
      May60°F71°F65°F0.3"
      June63°F73°F67°F0.0"
      July67°F77°F71°F0.2"
      August68°F78°F72°F0.1"
      September66°F79°F72°F0.2"
      October61°F77°F68°F0.7"
      November55°F73°F64°F0.9"
      December50°F68°F58°F2.3"

      National City 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.
      IndexNational CityCaliforniaNational
      Air quality index645550
      Pollution index45,820,50018,106,7265,066,862

      National City 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

      National City air quality information

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

      Average monthly National City temperature with heat index

      National City monthly precipitation with daily maximum

      National City monthly snow depth with daily maximum

      National City monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Bonita, CA12,8856428%
      Jamul, CA5,6406428%
      Spring Valley CDP (Lake County), CA1,1546428%
      Crest, CA2,7336428%
      La Mesa, CA59,1256428%
      National City, CA60,3496428%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Auburn, AL60,3184216%
      Cupertino, CA60,2974314%
      Bristol, CT60,4373726%
      Taylorsville, UT60,448512%
      Palm Harbor, FL60,2364314%
      National City, CA60,3496428%
      Source: The National City, 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.