TODAY MAR28
TEMPERATURE48
HUMIDITY95
PRESSURE
WIND COND.275 1.6
  • 6146Thu
  • 5746Fri80%90%
  • 6145Sat70%30%
  • 6346Sun
  • 6947Mon
daynightWeather update from LOS ALTOS at
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Weather Quick Facts

  • The highest monthly average temperature in Palo Alto for July is 66.7 degrees
  • The lowest monthly average temperature in Palo Alto for January is 50.4 degrees
  • The most monthly precipitation in Palo Alto occurs in December with 2.6 inches
  • The air quality index in Palo Alto is 2% worse than the national average
  • The pollution index in Palo Alto is 321% worse than the national average

Compare Palo Alto, CA Weather

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      Palo Alto 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"

      Palo Alto 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.
      IndexPalo AltoCaliforniaNational
      Air quality index435542
      Pollution index11,477,20010,473,1902,726,193

      Palo Alto 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

      Palo Alto air quality information

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

      Average monthly Palo Alto temperature with heat index

      Palo Alto monthly precipitation with daily maximum

      Palo Alto monthly snow depth with daily maximum

      Palo Alto monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Pescadero, CA4183530.0%
      Loma Mar, CA2823530.0%
      South San Francisco, CA66,8784020.0%
      Saratoga, CA31,0844314.0%
      Union City, CA75,0674314.0%
      Palo Alto, CA67,9734314.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Redmond, WA67,9594510.0%
      Gaithersburg, MD67,878476.0%
      Palatine, IL67,8755510.0%
      Union City, NJ68,073512.0%
      Yorba Linda, CA68,1038978.0%
      Palo Alto, CA67,9734314.0%
      Source: The Palo Alto, 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.