TODAY JUN02
TEMPERATURE68
HUMIDITY56
PRESSURE
WIND COND.188
  • 8355Tue
  • 8253Wed
  • 7552Thu
  • 6850Fri
  • 6649Sat
daynightWeather update from DW7094 Mill Valley at
How would you rate the weather in San Geronimo?
Write a review to give others more information about this area.
How would you rate the air quality in San Geronimo?
Write a review to give others more information about this area.
See all San Geronimo poll results

San Geronimo 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"

Did you know?

  • The highest monthly average temperature in San Geronimo for July is 65 degrees.
  • The lowest monthly average temperature in San Geronimo for December is 47 degrees.
  • The most monthly precipitation in San Geronimo occurs in January with 3.8 inches.
  • The air quality index in San Geronimo is 14% better than the national average.
  • The pollution index in San Geronimo is 62% worse than the national average.

Compare San Geronimo, CA Weather To Other Cities

      vs

      San Geronimo 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.
      IndexSan GeronimoCaliforniaNational
      Air quality index435550
      Pollution index8,232,36018,106,7265,066,862

      San Geronimo air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality241
      Days with moderate air quality115
      Days w/ poor A.Q. for sensitive groups9
      Days with unhealthy air quality

      San Geronimo air quality information

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

      Average monthly San Geronimo temperature with heat index

      San Geronimo monthly precipitation with daily maximum

      San Geronimo monthly snow depth with daily maximum

      San Geronimo monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Point Reyes Station, CA5743530%
      Black Point-Green Point, CA1,5924314%
      Lucas Valley-Marinwood, CA6,5944314%
      Nicasio, CA1134314%
      San Anselmo, CA12,6234314%
      San Geronimo, CA5974314%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Ricardo, TX5973138%
      Bend, CA5973824%
      De Valls Bluff, AR597476%
      Bryantown, MD597492%
      Canaseraga, NY5973040%
      San Geronimo, CA5974314%
      Source: The San Geronimo, 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.