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Key findings

  • The highest monthly average temperature in Rio del Mar for September is 62.1 degrees
  • The lowest monthly average temperature in Rio del Mar for December is 49.2 degrees
  • The most monthly precipitation in Rio del Mar occurs in December with 3.6 inches
  • The air quality index in Rio del Mar is 30% better than the national average
  • The pollution index in Rio del Mar is 7% worse than the national average

Compare Rio del Mar, CA Weather

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      Rio del Mar 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
      January40°F63°F50°F3.5"
      February42°F64°F52°F2.9"
      March44°F65°F53°F3.5"
      April45°F68°F55°F1.6"
      May48°F70°F57°F0.3"
      June51°F73°F60°F0.2"
      July54°F73°F61°F0.0"
      August54°F73°F62°F0.0"
      September53°F76°F62°F0.1"
      October50°F75°F60°F0.9"
      November44°F68°F54°F1.7"
      December39°F62°F49°F3.6"

      Rio del Mar 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.
      IndexRio del MarCaliforniaNational
      Air quality index355550
      Pollution index5,429,55018,106,7265,066,862

      Rio del Mar air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality347
      Days with moderate air quality18
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Rio del Mar air quality information

      PollutantTotal
      Arsenic0.020%
      Benzene0.080%
      Carbon Tetrachloride0.000%
      Lead0.050%
      Mercury0.150%

      Average monthly Rio del Mar temperature with heat index

      Rio del Mar monthly precipitation with daily maximum

      Rio del Mar monthly snow depth with daily maximum

      Rio del Mar monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Brookdale, CA2,4463530%
      Zayante, CA9413530%
      Bonny Doon, CA3,1173530%
      Freedom, CA2,7743530%
      Mount Hermon, CA9933530%
      Rio del Mar, CA9,7313530%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Fort Meade, MD9,730468%
      Tanaina, AK9,7363138%
      Maywood, NJ9,726512%
      Covington, LA9,7253040%
      Lock Haven, PA9,7253530%
      Rio del Mar, CA9,7313530%
      Source: The Rio del Mar, 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.