TODAY AUG21
TEMPERATURE61
HUMIDITY83
PRESSURE29.88
WIND COND.126
  • 7153Tue
  • 7453Wed
  • 7452Thu
  • 7451Fri
  • 7551Sat
daynightWeather update from DW7094 Mill Valley at

Mill Valley Average Weather

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
January41°F59°F50°F2.8"
February45°F62°F53°F3.1"
March47°F65°F55°F2.9"
April49°F67°F57°F1.8"
May52°F69°F59°F0.4"
June54°F72°F62°F0.3"
July56°F73°F63°F0.0"
August57°F73°F63°F0.0"
September55°F76°F64°F0.1"
October52°F73°F61°F1.0"
November47°F65°F56°F1.9"
December42°F59°F50°F4.1"

Did you know?

  • The highest monthly average temperature in Mill Valley for September is 64 degrees.
  • The lowest monthly average temperature in Mill Valley for January is 50 degrees.
  • The most monthly precipitation in Mill Valley occurs in December with 4.1 inches.
  • The air quality index in Mill Valley is 13% better than the national average.
  • The pollution index in Mill Valley is 62% worse than the national average.

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Compare Mill Valley, CA Weather To Other Cities

Mill Valley 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.
IndexMill ValleyCaliforniaNational
Air quality index435550
Pollution index8,232,36018,106,7265,066,862

Mill Valley 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

Mill Valley air quality information

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

Average monthly Mill Valley temperature with heat index

Mill Valley monthly precipitation with daily maximum

Mill Valley monthly snow depth with daily maximum

Mill Valley monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Point Reyes Station, CA5743530%
Nicasio, CA1134314%
Pinole, CA19,0404314%
Ross, CA2,3814314%
San Pablo, CA29,9914314%
Mill Valley, CA14,3184314%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Hobe Sound, FL14,3182942%
Beech Grove, IN14,3195918%
Fairview, NJ14,314536%
Niceville, FL14,3253138%
Chubbuck, ID14,3263530%
Mill Valley, CA14,3184314%
Source: The Mill Valley, 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.