TODAY OCT22
TEMPERATURE76
HUMIDITY31
PRESSURE
WIND COND.291 3
  • 8155Mon
  • 8056Tue
  • 8356Wed
  • 8660Thu
  • 9259Fri
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 70% worse than the national average.
  • The pollution index in Rancho Santa Margarita is 772% worse than the national average.

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Compare Rancho Santa Margarita, CA Weather To Other Cities

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.
Coto de Caza, CA14,8458570%
Laguna Beach, CA23,2048570%
Lake Forest, CA80,6588570%
Las Flores CDP (Tehama County), CA3248570%
San Juan Capistrano, CA36,0068570%
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.