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Personalized Forecasts

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    • Today

      May 25

      70° /55°
      Low clouds breaking
      • Poor
      • for stargazing
      • Cloud Cover: 95%
      • Precip: 11%
      • Hours of Precip: 0
      More
    • Fri

      May 26

      69° /54°F
      Low clouds, then some sun
      • Fair
      • for stargazing
      • Cloud Cover: 70%
      • Precip: 3%
      • Hours of Precip: 0
    • Sat

      May 27

      68° /53°
      Turning sunny; pleasant
      • Excellent
      • for stargazing
      • Cloud Cover: 23%
      • Precip: 0%
      • Hours of Precip: 0
      More
    • Sun

      May 28

      71° /54°
      Areas of low clouds, then sun
      • Poor
      • for stargazing
      • Cloud Cover: 70%
      • Precip: 0%
      • Hours of Precip: 0
      More
    • Mon

      May 29

      72° /55°
      Partly sunny
      • Poor
      • for stargazing
      • Cloud Cover: 79%
      • Precip: 0%
      • Hours of Precip: 0
      More
    60°/56° RealFeel® 56°/54°
    Partly to mostly cloudy
    • 7 mph
    • Precipitation: 0%
    • Rain: 0 in
    • Snow: 0 in
    • Humidity: 69%
    • Cloud Cover: 46%
    • Dew Point: 47° F
    • Visibility: 10 mi

    Temperature History

    more Historical Weather Data >
      Today Normal Record 5/26/2016
    High 69° 73° N/A 72°
    Low 54° 52° N/A 52°

    Sunrise/Sunset

    • Sunrise: 5:51 AM
    • Sunset: 8:20 PM
    • Duration: 14:29 hr

    Moonrise/Moonset

    • Moonrise: 6:56 AM
    • Moonset: 9:31 PM
    • Duration: 14:35 hr
    Astronomy

    Solunar Information for Castro Valley, CA

    Thu, May 25
    New
    Thu, Jun 1
    First
    Fri, Jun 9
    Full
    Sat, Jun 17
    Last

    Fri. Stargazing