TODAY AUG14
TEMPERATURE54
HUMIDITY91
PRESSURE29.87
WIND COND.70
  • 8353Tue
  • 8454Wed
  • 8552Thu
  • 8752Fri
  • 8852Sat
daynightWeather update from DW7094 Mill Valley at

Fairfax 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
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 Fairfax for July is 65 degrees.
  • The lowest monthly average temperature in Fairfax for December is 47 degrees.
  • The most monthly precipitation in Fairfax occurs in January with 3.8 inches.
  • The air quality index in Fairfax is 13% better than the national average.
  • The pollution index in Fairfax is 62% worse than the national average.

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Compare Fairfax, CA Weather To Other Cities

Fairfax 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.
IndexFairfaxCaliforniaNational
Air quality index435550
Pollution index8,232,36018,106,7265,066,862

Fairfax 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

Fairfax air quality information

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

Average monthly Fairfax temperature with heat index

Fairfax monthly precipitation with daily maximum

Fairfax monthly snow depth with daily maximum

Fairfax monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Point Reyes Station, CA5743530%
Alto, CA6494314%
Corte Madera, CA9,6944314%
Larkspur, CA12,2684314%
Montalvin Manor, CA3,1744314%
Fairfax, CA7,5984314%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Yreka, CA7,598468%
Selah, WA7,5994020%
Rockton, IL7,5963138%
Sanger, TX7,595548%
Holly Springs, MS7,5914412%
Fairfax, CA7,5984314%
Source: The Fairfax, 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.