TODAY NOV25
TEMPERATURE52
HUMIDITY86
PRESSURE102070
WIND COND.
  • 7053
  • 6856Tue30%
  • 6654Wed30%
  • 6754
  • 6756Fri
daynightWeather update from San Diego International Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Old Town for August is 71.1 degrees
  • The lowest monthly average temperature in Old Town for December is 57.5 degrees
  • The most monthly precipitation in Old Town occurs in December with 2.2 inches
  • The air quality index in Old Town is 52% worse than the national average
  • The pollution index in Old Town is 1581% worse than the national average

Compare San Diego, CA Weather

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      Old Town 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°F1.7"
      February51°F68°F59°F1.8"
      March54°F69°F60°F1.0"
      April56°F70°F62°F0.6"
      May60°F70°F64°F0.4"
      June62°F72°F66°F0.0"
      July66°F76°F70°F0.2"
      August67°F78°F71°F0.0"
      September66°F78°F71°F0.2"
      October61°F77°F68°F0.5"
      November55°F73°F63°F0.9"
      December49°F67°F58°F2.2"

      Old Town 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.
      IndexOld TownSan DiegoCalifornia
      Air quality index646455
      Pollution index45,820,50045,820,50010,473,190

      Old Town air quality

      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

      Air quality details

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

      Average monthly Old Town temperature with heat index

      Old Town monthly precipitation with daily maximum

      Old Town monthly snow depth with daily maximum

      Old Town monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Chula Vista, CA268,7796428.0%
      Lemon Grove, CA26,7396428.0%
      Bostonia, CA17,5326428.0%
      La Mesa, CA60,2086428.0%
      Coronado, CA24,5266428.0%
      San Diego, CA1,414,5456428.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Calgary, AB1,371,990n/a 
      Dallas, TX1,338,846512.0%
      San Antonio, TX1,529,133492.0%
      Philadelphia, PA1,581,531512.0%
      Phoenix, AZ1,658,4227448.0%
      San Diego, CA1,414,5456428.0%
      Source: The Old Town, San Diego, 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.