TODAY JAN27
TEMPERATURE48
HUMIDITY86
PRESSURE29.81
WIND COND.150 20.5
  • 5742Thu80%50%
  • 5641Fri20%
  • 5942Sat
  • 6245Sun
  • 6143Mon
daynightWeather update from San Jose, San Jose International Airport at

Key findings

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

Compare Sunnyvale, CA Weather

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      Sunnyvale 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"

      Sunnyvale 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.
      IndexSunnyvaleCaliforniaNational
      Air quality index435550
      Pollution index11,477,20018,106,7265,066,862

      Sunnyvale 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

      Sunnyvale air quality information

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

      Average monthly Sunnyvale temperature with heat index

      Sunnyvale monthly precipitation with daily maximum

      Sunnyvale monthly snow depth with daily maximum

      Sunnyvale monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Loma Mar, CA1503530%
      Fremont, CA227,9344314%
      Stanford, CA14,9264314%
      Emerald Lake Hills, CA4,7164314%
      Cambrian Park, CA3,2594314%
      Sunnyvale, CA149,5964314%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Rockford, IL149,5974216%
      Kansas City, KS149,755476%
      Lakewood, CO149,7935816%
      Escondido, CA149,9126428%
      Hollywood, FL148,1144118%
      Sunnyvale, CA149,5964314%
      Source: The Sunnyvale, 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.