TODAY OCT31
TEMPERATURE66
HUMIDITY50
PRESSURE102000
WIND COND.280 22.3
  • 6554Fri100%
  • 6550Sat40%
  • 6953Sun
  • 7151Mon
  • 7254Tue
daynightWeather update from Hayward, Hayward Air Terminal at
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Weather Quick Facts

  • The highest monthly average temperature in San Leandro for September is 63.6 degrees
  • The lowest monthly average temperature in San Leandro for January is 49.6 degrees
  • The most monthly precipitation in San Leandro occurs in December with 4.1 inches
  • The air quality index in San Leandro is 5% better than the national average
  • The pollution index in San Leandro is 136% worse than the national average

Compare San Leandro, CA Weather

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      San Leandro 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°F59°F50°F2.8"
      February45°F62°F53°F3.1"
      March47°F65°F55°F2.9"
      April49°F67°F57°F1.8"
      May52°F69°F59°F0.4"
      June54°F72°F62°F0.3"
      July56°F73°F63°F0.0"
      August57°F73°F63°F0.0"
      September55°F76°F64°F0.1"
      October52°F73°F61°F1.0"
      November47°F65°F56°F1.9"
      December42°F59°F50°F4.1"

      San Leandro 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 LeandroCaliforniaNational
      Air quality index405542
      Pollution index6,427,29010,473,1902,726,193

      San Leandro air quality

      MeasurementTotal
      Days measured365
      Days with good air quality290
      Days with moderate air quality74
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.010%
      Benzene0.110%
      Carbon Tetrachloride0.010%
      Lead0.010%
      Mercury0.003%

      Average monthly San Leandro temperature with heat index

      San Leandro monthly precipitation with daily maximum

      San Leandro monthly snow depth with daily maximum

      San Leandro monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Lafayette, CA25,9494020.0%
      San Miguel CDP (San Luis Obispo County), CA2,6964020.0%
      Blackhawk, CA10,5904020.0%
      Danville, CA44,9334020.0%
      Norris Canyon, CA7904020.0%
      San Leandro, CA90,4894020.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Bellingham, WA90,8213432.0%
      Westminster, CA90,8577244.0%
      Toms River, NJ90,0814118.0%
      Santa Barbara, CA90,9114412.0%
      Indio, CA89,9968978.0%
      San Leandro, CA90,4894020.0%
      Source: The San Leandro, 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.