TODAY APR19
TEMPERATURE65
HUMIDITY60
PRESSURE
WIND COND.63 3.2
  • 7349Fri
  • 7148Sat
  • 7551Sun
  • 7751Mon
  • 6850Tue
daynightWeather update from LOS ALTOS at
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Weather Quick Facts

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

Compare Palo Alto, CA Weather

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      Old 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"

      Old 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.
      IndexOld Palo AltoPalo AltoCalifornia
      Air quality index434355
      Pollution index11,477,20011,477,20010,473,190

      Old 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

      Old Palo Alto air quality information

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

      Average monthly Old Palo Alto temperature with heat index

      Old Palo Alto monthly precipitation with daily maximum

      Old Palo Alto monthly snow depth with daily maximum

      Old Palo Alto monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Loma Mar, CA2823530.0%
      Pescadero, CA4183530.0%
      Saratoga, CA31,0844314.0%
      Union City, CA75,0674314.0%
      Foster City, CA33,0564314.0%
      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 Old Palo Alto, 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.