, °F

Personalized Forecasts

Featured Forecast

My Favorite Forecasts

    My Recent Locations

    • Today

      Dec 12

      66° /41°F
      Plenty of sunshine
      • Excellent
      • for stargazing
      • Cloud Cover: 0%
      • Precip: 0%
      • Hours of Precip: 0
    • Wed

      Dec 13

      64° /42°
      Brilliant sunshine
      • Excellent
      • for stargazing
      • Cloud Cover: 0%
      • Precip: 1%
      • Hours of Precip: 0
      More
    • Thu

      Dec 14

      65° /44°
      Plenty of sun
      • Very Good
      • for stargazing
      • Cloud Cover: 16%
      • Precip: 1%
      • Hours of Precip: 0
      More
    • Fri

      Dec 15

      64° /46°
      Some sun, then clouds
      • Fair
      • for stargazing
      • Cloud Cover: 43%
      • Precip: 2%
      • Hours of Precip: 0
      More
    • Sat

      Dec 16

      66° /47°
      Mostly sunny
      • Excellent
      • for stargazing
      • Cloud Cover: 11%
      • Precip: 2%
      • Hours of Precip: 0
      More
    Tuesday
    4pm
    5pm
    6pm
    7pm
    8pm
    9pm
    10pm
    11pm
    Forecast Sunny Clear Clear Clear Clear Clear Clear Clear
    Temp (°F) 64° 59° 56° 53° 51° 50° 49° 48°
    RealFeel® 65° 59° 55° 52° 50° 49° 48° 47°
    Wind (mph) 5 NE 5 ENE 5 E 5 E 5 E 5 E 5 E 5 E
    precip
    4pm
    5pm
    6pm
    7pm
    8pm
    9pm
    10pm
    11pm
    Rain
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    Snow
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    Ice
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    SKY
    4pm
    5pm
    6pm
    7pm
    8pm
    9pm
    10pm
    11pm
    UV Index 1 0 0 0 0 0 0 0
    Cloud Cover 0% 0% 0% 0% 0% 0% 0% 0%
    Humidity 33% 39% 44% 47% 49% 49% 50% 50%
    Dew Point 34° 34° 34° 33° 33° 32° 31° 30°
    Visibility 10 mi 10 mi 10 mi 10 mi 10 mi 10 mi 10 mi 10 mi
    Temp °F
    4pm
    5pm
    6pm
    7pm
    8pm
    9pm
    10pm
    11pm
    65° 60° 55° 50° 45°

    Temperature History

    more Historical Weather Data >
      Today Normal Record 12/12/2016
    High 66° 57° N/A 58°
    Low 41° 42° N/A 45°

    Sunrise/Sunset

    • Sunrise: 7:14 AM
    • Sunset: 4:50 PM
    • Duration: 9:36 hr

    Moonrise/Moonset

    • Moonrise: 1:54 AM
    • Moonset: 1:55 PM
    • Duration: 12:01 hr
    Astronomy

    Solunar Information for Castro Valley, CA

    Mon, Dec 18
    New
    Tue, Dec 26
    First
    Tue, Jan 2
    Full
    Mon, Jan 8
    Last

    Tue. Stargazing