TODAY MAR08
TEMPERATURE60
HUMIDITY42
PRESSURE30.09
WIND COND.179 1.6
  • 5444Mon30%50%
  • 5443Tue90%80%
  • 5340Wed60%20%
  • 5841Thu
  • 6142Fri
daynightWeather update from DW7094 Mill Valley at

Key findings

  • The highest monthly average temperature in Ross for July is 65 degrees
  • The lowest monthly average temperature in Ross for December is 47 degrees
  • The most monthly precipitation in Ross occurs in January with 3.8 inches
  • The air quality index in Ross is 20% better than the national average
  • The pollution index in Ross is 62% worse than the national average

Compare Ross, CA Weather

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      Ross 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
      January36°F58°F47°F3.8"
      February39°F62°F50°F3.4"
      March41°F66°F52°F3.0"
      April42°F69°F55°F1.6"
      May46°F74°F59°F0.5"
      June50°F80°F64°F0.3"
      July53°F81°F65°F0.0"
      August53°F80°F64°F0.0"
      September49°F82°F64°F0.1"
      October45°F76°F59°F1.3"
      November40°F66°F52°F1.8"
      December36°F58°F47°F3.8"

      Ross 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.
      IndexRossCaliforniaNational
      Air quality index405550
      Pollution index8,232,36018,106,7265,066,862

      Ross air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality290
      Days with moderate air quality74
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Ross air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.060%
      Carbon Tetrachloride0.000%
      Lead0.010%
      Mercury0.010%

      Average monthly Ross temperature with heat index

      Ross monthly precipitation with daily maximum

      Ross monthly snow depth with daily maximum

      Ross monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Point Reyes Station, CA5743432%
      Emeryville, CA11,1114020%
      Marin City, CA3,1154020%
      Stinson Beach, CA6034020%
      Tiburon, CA9,1704020%
      Ross, CA2,3814020%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Cabool, MO2,3813922%
      Winneconne, WI2,3823726%
      Clay, PA2,3794510%
      Kentwood, LA2,3793040%
      Old Orchard, PA2,3784216%
      Ross, CA2,3814020%
      Source: The Ross, 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.