TODAY MAY12
TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.
  • 7555Thu
  • 7254Fri
  • 6753Sat
  • 6553Sun
  • 7054Mon
daynightWeather update from CW5283 Foothill Ranch at

Key findings

  • The highest monthly average temperature in Rancho Santa Margarita for August is 72.2 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 79% 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

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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"

      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 index895550
      Pollution index44,192,60018,106,7265,066,862

      Rancho Santa Margarita air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality42
      Days with moderate air quality178
      Days w/ poor A.Q. for sensitive groups79
      Days with unhealthy air quality58

      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.
      Dana Point, CA34,0098978%
      San Clemente, CA65,0828978%
      Lakeland Village, CA11,6988978%
      Laguna Woods, CA16,3478978%
      North Tustin, CA26,2088978%
      Rancho Santa Margarita, CA49,0388978%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Methuen Town, MA49,0433726%
      Severn, MD49,017468%
      Cypress, CA48,9787244%
      La Mirada, CA49,1307244%
      Harrisburg, PA49,1604412%
      Rancho Santa Margarita, CA49,0388978%
      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.