TODAY AUG16
TEMPERATURE55
HUMIDITY91
PRESSURE
WIND COND.280 3
  • 7756Thu
  • 8055Fri
  • 8155Sat
  • 8055Sun
  • 7955Mon
daynightWeather update from LOS ALTOS at

Palo Alto 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
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"

Did you know?

  • The highest monthly average temperature in Palo Alto for July is 67 degrees.
  • The lowest monthly average temperature in Palo Alto for January is 50 degrees.
  • The most monthly precipitation in Palo Alto occurs in December with 2.6 inches.
  • The air quality index in Palo Alto is 3% better than the national average.
  • The pollution index in Palo Alto is 126% worse than the national average.

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Compare Palo Alto, CA Weather To Other Cities

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 index485550
Pollution index11,477,20018,106,7265,066,862

Palo Alto air quality information

MeasurementTotal
Days measured365
Days with good air quality204
Days with moderate air quality153
Days w/ poor A.Q. for sensitive groups7
Days with unhealthy air quality1

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

City, StatePopulationAir Quality IndexNational Avg.
Loma Mar, CA1503628%
Pescadero, CA1,0403628%
South San Francisco, CA66,5874314%
Belmont, CA26,918484%
Cupertino, CA60,297484%
Palo Alto, CA66,649484%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Portland, ME66,6493824%
Camarillo, CA66,630484%
Woodbury, MN66,6994412%
South San Francisco, CA66,5874314%
Oshkosh, WI66,7133628%
Palo Alto, CA66,649484%
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.