TODAY FEB28
TEMPERATURE47
HUMIDITY66
PRESSURE
WIND COND.34 6.4
  • 6642Sun
  • 6643Mon
  • 6644Tue
  • 6643Wed
  • 6645Thu
daynightWeather update from LOS ALTOS at

Key findings

  • The highest monthly average temperature in Los Altos for July is 67 degrees
  • The lowest monthly average temperature in Los Altos for January is 50 degrees
  • The most monthly precipitation in Los Altos occurs in December with 2.6 inches
  • The air quality index in Los Altos is 14% better than the national average
  • The pollution index in Los Altos is 127% worse than the national average

Compare Los Altos, CA Weather

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      Los Altos 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
      January42°F61°F50°F2.4"
      February45°F63°F53°F2.4"
      March47°F67°F56°F2.0"
      April49°F70°F58°F1.3"
      May53°F73°F61°F0.3"
      June56°F77°F65°F0.2"
      July59°F78°F67°F0.0"
      August59°F78°F66°F0.0"
      September57°F80°F67°F0.1"
      October53°F75°F63°F0.7"
      November47°F67°F56°F1.3"
      December42°F60°F51°F2.6"

      Los Altos 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.
      IndexLos AltosCaliforniaNational
      Air quality index435550
      Pollution index11,477,20018,106,7265,066,862

      Los Altos air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality263
      Days with moderate air quality98
      Days w/ poor A.Q. for sensitive groups4
      Days with unhealthy air quality0

      Los Altos air quality information

      PollutantTotal
      Arsenic0.070%
      Benzene0.110%
      Carbon Tetrachloride0.000%
      Lead0.160%
      Mercury0.090%

      Average monthly Los Altos temperature with heat index

      Los Altos monthly precipitation with daily maximum

      Los Altos monthly snow depth with daily maximum

      Los Altos monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Lexington Hills, CA2,6173530%
      Loma Mar, CA1503530%
      Santa Clara, CA122,7254314%
      Sunol, CA1,0044314%
      Highlands-Baywood Park, CA4,2614314%
      Los Altos, CA30,2384314%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Liberty, MO30,239476%
      Sherwood, AR30,2514510%
      Santa Paula, CA30,283468%
      North Royalton, OH30,30250= 100
      Madison Heights, MI30,1685612%
      Los Altos, CA30,2384314%
      Source: The Los Altos, 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.