, °F

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    Next 5 Days
    • Current Weather

      56° F
      Partly sunny
      Stargazing
      • Visibility: 10 mi
      • Cloud Cover: 35%
      • Ceiling: 35000 ft
    • Today

      Feb 21

      56° Hi
      Partly sunny
      • Poor
      • for stargazing
      • Cloud Cover: 63%
      • Precip: 21%
      • Hours of Precip: 0
      } Day Details
    • Tomorrow

      Feb 22

      53° Hi
      Clouds and sun with a shower
      • Good
      • for stargazing
      • Cloud Cover: 26%
      • Precip: 51%
      • Hours of Precip: 1.5
      } Day Details
    • Friday

      Feb 23

      56° Hi
      Partly sunny and cool
      • Very Good
      • for stargazing
      • Cloud Cover: 5%
      • Precip: 1%
      • Hours of Precip: 0
      } Day Details
    Next 6 Hours
    • 3PM

      Feb 21

      56°
      Partly sunny
      Precip 0%
    • 4PM

      55°
      Partly sunny
      Precip 0%
    • 5PM

      53°
      Partly sunny
      Precip 0%
    • 6PM

      51°
      Partly cloudy
      Precip 0%
    • 7PM

      49°
      Partly cloudy
      Precip 1%
    • 8PM

      47°
      Partly cloudy
      Precip 1%
    As cold air remains in place, a storm system will bring some snow to the Sierra Nevada and showers to Southern California later this week.
    When will unseasonable cold subside across western US?

    Sunrise/Sunset

    • Sunrise: 6:51 AM
    • Sunset: 5:54 PM
    • Duration: 11:03 hr

    Moonrise/Moonset

    • Moonrise: 10:17 AM
    • Moonset: 11:58 PM
    • Duration: 13:41 hr
    Astronomy

    Solunar Information for Castro Valley, CA

    Fri, Feb 23
    First
    Fri, Mar 2
    Full
    Fri, Mar 9
    Last
    Sat, Mar 17
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    Astronomy Live Feed

    Wed. Stargazing