TODAY OCT14
TEMPERATURE62
HUMIDITY76
PRESSURE101680.82
WIND COND.341 4
  • 8453Tue
  • 7949Wed
  • 7349Thu
  • 7243Fri
  • 7644Sat
daynightWeather update from Mendota (P304) at
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Weather Quick Facts

  • The highest monthly average temperature in San Joaquin for July is 82.9 degrees
  • The lowest monthly average temperature in San Joaquin for December is 46 degrees
  • The most monthly precipitation in San Joaquin occurs in January with 1.5 inches
  • The air quality index in San Joaquin is 43% worse than the national average
  • The pollution index in San Joaquin is 510% worse than the national average

Compare San Joaquin, CA Weather

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      San Joaquin 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
      January36°F58°F46°F1.5"
      February39°F65°F51°F1.2"
      March42°F72°F57°F1.0"
      April46°F78°F62°F0.6"
      May52°F87°F70°F0.3"
      June58°F95°F78°F0.1"
      July63°F101°F83°F0.0"
      August62°F99°F81°F0.0"
      September58°F94°F76°F0.0"
      October49°F83°F65°F0.3"
      November41°F69°F54°F0.6"
      December35°F59°F46°F1.3"

      San Joaquin 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.
      IndexSan JoaquinCaliforniaNational
      Air quality index605542
      Pollution index16,639,20010,473,1902,726,193

      San Joaquin air quality

      MeasurementTotal
      Days measured365
      Days with good air quality139
      Days with moderate air quality160
      Days w/ poor A.Q. for sensitive groups64
      Days with unhealthy air quality2

      Air quality details

      PollutantTotal
      Arsenic0.210%
      Benzene0.250%
      Carbon Tetrachloride0.002%
      Lead0.180%
      Mercury0.230%

      Average monthly San Joaquin temperature with heat index

      San Joaquin monthly precipitation with daily maximum

      San Joaquin monthly snow depth with daily maximum

      San Joaquin monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Mendota, CA12,17350= 100
      Tranquillity, CA80750= 100
      Cantua Creek, CA37650= 100
      Biola, CA1,44050= 100
      Three Rocks, CA9750= 100
      San Joaquin, CA4,0256020.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Westborough, MA4,0244020.0%
      Caro, MI4,0242648.0%
      Ellenville, NY4,0243628.0%
      Bluffton, OH4,0243922.0%
      Saint-Ambroise-de-Kildare, QC4,024n/a 
      San Joaquin, CA4,0256020.0%
      Source: The San Joaquin, 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.