TODAY FEB29
TEMPERATURE52
HUMIDITY71
PRESSURE101730
WIND COND.170 14.8
  • 5645Fri80%100%
  • 5442Sat100%60%
  • 5640Sun40%
  • 5843Mon
  • 6244Tue
daynightWeather update from San Jose / Reid / Hillv at
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Weather Quick Facts

  • The highest monthly average temperature in Alum Rock for July is 68.1 degrees
  • The lowest monthly average temperature in Alum Rock for January is 50.1 degrees
  • The most monthly precipitation in Alum Rock occurs in February with 2.5 inches
  • The air quality index in Alum Rock is 2% worse than the national average
  • The pollution index in Alum Rock is 762% worse than the national average

Compare Alum Rock, CA Weather

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      Alum Rock 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
      January41°F61°F50°F2.5"
      February44°F64°F53°F2.5"
      March46°F68°F56°F2.1"
      April48°F71°F58°F1.3"
      May52°F75°F62°F0.3"
      June56°F80°F66°F0.2"
      July58°F82°F68°F0.0"
      August58°F82°F68°F0.0"
      September57°F82°F67°F0.1"
      October53°F77°F63°F0.6"
      November46°F68°F56°F1.3"
      December41°F61°F50°F2.4"

      Alum Rock 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.
      IndexAlum RockCaliforniaNational
      Air quality index435542
      Pollution index23,499,80010,473,1902,726,193

      Alum Rock 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

      Alum Rock air quality information

      PollutantTotal
      Arsenic0.120%
      Benzene0.170%
      Carbon Tetrachloride0.001%
      Lead0.220%
      Mercury0.140%

      Average monthly Alum Rock temperature with heat index

      Alum Rock monthly precipitation with daily maximum

      Alum Rock monthly snow depth with daily maximum

      Alum Rock monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Lexington Hills, CA2,6563530.0%
      Saratoga, CA31,0844314.0%
      Campbell, CA42,8914314.0%
      Los Gatos, CA31,9434314.0%
      Loyola, CA3,4044314.0%
      Alum Rock, CA11,7984314.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      North Dundas, ON11,794n/a 
      North Wantagh, NY11,792512.0%
      Robinson, TX11,8063824.0%
      Martinsville, IN11,8074216.0%
      Bucyrus, OH11,8084118.0%
      Alum Rock, CA11,7984314.0%
      Source: The Alum Rock, 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.