TODAY FEB28
TEMPERATURE66
HUMIDITY64
PRESSURE29.9
WIND COND.200 22.3
  • 7246Sun
  • 7046Mon
  • 6645Tue30%
  • 6447Wed
  • 6749Thu
daynightWeather update from Los Alamitos U. S. Army Airfield at

Key findings

  • The highest monthly average temperature in Rossmoor for August is 72 degrees
  • The lowest monthly average temperature in Rossmoor for December is 55 degrees
  • The most monthly precipitation in Rossmoor occurs in December with 7.6 inches
  • The air quality index in Rossmoor is 45% worse than the national average
  • The pollution index in Rossmoor is 83% better than the national average

Compare Rossmoor, CA Weather

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      Rossmoor 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
      January45°F69°F56°F7.4"
      February47°F68°F57°F5.5"
      March50°F71°F60°F2.6"
      April52°F73°F62°F1.3"
      May57°F74°F64°F2.3"
      June60°F77°F67°F0.1"
      July64°F81°F71°F0.5"
      August64°F83°F72°F0.2"
      September62°F84°F71°F5.2"
      October57°F80°F67°F1.7"
      November50°F74°F61°F2.9"
      December44°F67°F55°F7.6"

      Rossmoor 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.
      IndexRossmoorCaliforniaNational
      Air quality index725550
      Pollution index858,65218,106,7265,066,862

      Rossmoor air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality66
      Days with moderate air quality208
      Days w/ poor A.Q. for sensitive groups62
      Days with unhealthy air quality28

      Rossmoor air quality information

      PollutantTotal
      Arsenic0.002%
      Benzene0.010%
      Carbon Tetrachloride0.000%
      Lead0.020%
      Mercury0.001%

      Average monthly Rossmoor temperature with heat index

      Rossmoor monthly precipitation with daily maximum

      Rossmoor monthly snow depth with daily maximum

      Rossmoor monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Gardena, CA59,8987244%
      Willowbrook, CA22,0357244%
      Commerce, CA12,9977244%
      Hawaiian Gardens, CA14,4687244%
      La Mirada, CA49,1307244%
      Rossmoor, CA10,9337244%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Broomall, PA10,935512%
      Brooklyn, OH10,93650= 100
      Woods Cross, UT10,930512%
      Suffern, NY10,936512%
      Fairfield, AL10,937536%
      Rossmoor, CA10,9337244%
      Source: The Rossmoor, 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.