TODAY NOV17
TEMPERATURE47
HUMIDITY83
PRESSURE30.03
WIND COND.190 3.4
  • 6245Sun
  • 6445Mon
  • 6348Tue
  • 6047Wed
  • 6147
daynightWeather update from San Francisco, San Francisco International Airport at

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San Mateo 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
January44°F58°F51°F3.2"
February46°F62°F53°F3.4"
March47°F64°F54°F2.7"
April49°F67°F56°F1.7"
May51°F69°F58°F0.3"
June54°F72°F61°F0.2"
July56°F73°F62°F0.0"
August56°F73°F62°F0.0"
September56°F76°F63°F0.1"
October54°F73°F62°F1.0"
November49°F65°F56°F1.7"
December44°F58°F51°F4.4"

Did you know?

  • The highest monthly average temperature in San Mateo for September is 63 degrees.
  • The lowest monthly average temperature in San Mateo for January is 51 degrees.
  • The most monthly precipitation in San Mateo occurs in December with 4.4 inches.
  • The air quality index in San Mateo is 3% better than the national average.
  • The pollution index in San Mateo is 90% worse than the national average.

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Compare San Mateo, CA Weather To Other Cities

San Mateo 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.
IndexSan MateoCaliforniaNational
Air quality index485550
Pollution index9,645,61018,106,7265,066,862

San Mateo 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

San Mateo air quality information

PollutantTotal
Arsenic0.140%
Benzene0.070%
Carbon Tetrachloride0.000%
Lead0.100%
Mercury0.020%

Average monthly San Mateo temperature with heat index

San Mateo monthly precipitation with daily maximum

San Mateo monthly snow depth with daily maximum

San Mateo monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Castro Valley, CA62,8254314%
San Lorenzo, CA24,7904314%
Alameda, CA77,4094314%
Brisbane, CA4,5684314%
South San Francisco, CA66,5874314%
San Mateo, CA102,224484%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Sandy Springs, GA102,212524%
Clovis, CA102,1488060%
Davenport, IA102,3055510%
Lewisville, TX102,327548%
Rialto, CA102,4188570%
San Mateo, CA102,224484%
Source: The San Mateo, 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.