TODAY NOV21
TEMPERATURE70
HUMIDITY36
PRESSURE102030
WIND COND.300 7.6
  • 6853Fri20%90%
  • 6146Sat80%50%
  • 6149Sun50%
  • 6148Mon
  • 6347Tue
daynightWeather update from San Luis Obispo, San Luis Obispo County-Mc Chesney Field at
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Weather Quick Facts

  • The highest monthly average temperature in San Luis Obispo for September is 64.9 degrees
  • The lowest monthly average temperature in San Luis Obispo for December is 52 degrees
  • The most monthly precipitation in San Luis Obispo occurs in January with 3.9 inches
  • The air quality index in San Luis Obispo is 9% worse than the national average
  • The pollution index in San Luis Obispo is 106% worse than the national average

Compare San Luis Obispo, CA Weather

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      San Luis Obispo 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
      January41°F68°F53°F3.9"
      February43°F67°F54°F2.6"
      March45°F69°F55°F2.2"
      April47°F71°F57°F1.4"
      May49°F73°F59°F0.3"
      June52°F77°F62°F0.1"
      July55°F79°F64°F0.1"
      August56°F80°F64°F0.0"
      September55°F82°F65°F0.0"
      October52°F80°F63°F0.9"
      November46°F73°F57°F1.1"
      December41°F66°F52°F3.1"

      San Luis Obispo 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 Luis ObispoCaliforniaNational
      Air quality index465542
      Pollution index5,611,11010,473,1902,726,193

      San Luis Obispo air quality

      MeasurementTotal
      Days measured365
      Days with good air quality230
      Days with moderate air quality132
      Days w/ poor A.Q. for sensitive groups3
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.020%
      Benzene0.060%
      Carbon Tetrachloride0.000%
      Lead0.060%
      Mercury0.010%

      Average monthly San Luis Obispo temperature with heat index

      San Luis Obispo monthly precipitation with daily maximum

      San Luis Obispo monthly snow depth with daily maximum

      San Luis Obispo monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Grover Beach, CA13,481468.0%
      Pismo Beach, CA8,042468.0%
      Avila Beach, CA1,455468.0%
      Edna, CA408468.0%
      Los Berros, CA301468.0%
      San Luis Obispo, CA47,402468.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Ocoee, FL47,4333922.0%
      East Providence, RI47,4424412.0%
      Beavercreek, OH47,343476.0%
      Charleston, WV47,2734020.0%
      Woodstock, ON47,584n/a 
      San Luis Obispo, CA47,402468.0%
      Source: The San Luis Obispo, 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.