TODAY MAY30
TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.
  • 8056Sun
  • 8257Mon
  • 8457Tue
  • 8557Wed
  • 8058Thu
daynightWeather update from CW5283 Foothill Ranch at
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Rancho Santa Margarita 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°F69°F57°F2.3"
February49°F69°F58°F1.9"
March52°F70°F60°F0.9"
April54°F72°F62°F0.6"
May59°F73°F65°F0.3"
June62°F76°F67°F0.0"
July66°F80°F71°F0.1"
August66°F82°F72°F0.0"
September65°F82°F72°F0.2"
October60°F79°F68°F0.5"
November54°F75°F63°F0.7"
December48°F68°F57°F2.4"

Did you know?

  • The highest monthly average temperature in Rancho Santa Margarita for August is 72 degrees.
  • The lowest monthly average temperature in Rancho Santa Margarita for December is 57 degrees.
  • The most monthly precipitation in Rancho Santa Margarita occurs in December with 2.4 inches.
  • The air quality index in Rancho Santa Margarita is 71% worse than the national average.
  • The pollution index in Rancho Santa Margarita is 772% worse than the national average.

Compare Rancho Santa Margarita, CA Weather To Other Cities

      vs

      Rancho Santa Margarita 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.
      IndexRancho Santa MargaritaCaliforniaNational
      Air quality index855550
      Pollution index44,192,60018,106,7265,066,862

      Rancho Santa Margarita air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality24
      Days with moderate air quality211
      Days w/ poor A.Q. for sensitive groups102
      Days with unhealthy air quality25

      Rancho Santa Margarita air quality information

      PollutantTotal
      Arsenic0.030%
      Benzene0.280%
      Carbon Tetrachloride0.001%
      Lead0.220%
      Mercury0.140%

      Average monthly Rancho Santa Margarita temperature with heat index

      Rancho Santa Margarita monthly precipitation with daily maximum

      Rancho Santa Margarita monthly snow depth with daily maximum

      Rancho Santa Margarita monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Irvine, CA246,9928570%
      Laguna Niguel, CA64,9848570%
      Lake Mathews, CA5,9568570%
      North Tustin, CA26,2088570%
      Tustin, CA79,3968570%
      Rancho Santa Margarita, CA49,0388570%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Methuen Town, MA49,0433628%
      Severn, MD49,017468%
      Cypress, CA48,9787448%
      La Mirada, CA49,1307448%
      Harrisburg, PA49,160524%
      Rancho Santa Margarita, CA49,0388570%
      Source: The Rancho Santa Margarita, 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.