, °F

Personalized Forecasts

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    My Recent Locations

    • Today

      Dec 8

      60° /55°
      Mostly cloudy, a little rain
      • Poor
      • for stargazing
      • Cloud Cover: 94%
      • Precip: 60%
      • Hours of Precip: 3.5
      More
    • Fri

      Dec 9

      63° /55°
      A brief shower or two
      • Poor
      • for stargazing
      • Cloud Cover: 94%
      • Precip: 75%
      • Hours of Precip: 3
      More
    • Sat

      Dec 10

      60° /48°
      Mostly cloudy, brief showers
      • Poor
      • for stargazing
      • Cloud Cover: 96%
      • Precip: 25%
      • Hours of Precip: 3.5
      More
    • Sun

      Dec 11

      57° /45°
      Periods of clouds and sun
      • Poor
      • for stargazing
      • Cloud Cover: 73%
      • Precip: 9%
      • Hours of Precip: 0
      More
    • Mon

      Dec 12

      56° /46°F
      Mostly cloudy
      • Poor
      • for stargazing
      • Cloud Cover: 81%
      • Precip: 40%
      • Hours of Precip: 0.5

    Day

    56°Hi RealFeel® 56° Precipitation 8%
    Mostly cloudy
    • NE 6 mph
    • Gusts: 8 mph
    • Max UV Index: 1 (Low)
    • Thunderstorms: 0%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Night

    46°Lo RealFeel® 44° Precipitation 40%
    Mostly cloudy with a shower in spots late
    • ENE 5 mph
    • Gusts: 7 mph
    • Max UV Index: N/A
    • Thunderstorms: 20%
    • Precipitation: 0.01 in
    • Rain: 0.01 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0.5 hrs
    • Hours of Rain: 0.5 hrs

    Temperature History

    more Historical Weather Data >
      Today Normal Record 12/12/2015
    High 56° 57° N/A 58°
    Low 46° 42° N/A 40°

    Sunrise/Sunset

    • Sunrise: 7:15 AM
    • Sunset: 4:50 PM
    • Duration: 9:35 hr

    Moonrise/Moonset

    • Moonrise: 4:13 PM
    • Moonset: 6:37 AM
    • Duration: 14:24 hr
    Astronomy

    Solunar Information for Castro Valley, CA

    Wed, Dec 14
    Full
    Wed, Dec 21
    Last
    Thu, Dec 29
    New
    Thu, Jan 5
    First

    Mon. Stargazing