, °F

Personalized Forecasts

Featured Forecast

My Favorite Forecasts

    My Recent Locations

    • Early AM

      May 28

      54° Lo
      Low clouds
      • Stargazing
      • Weather
      • Cloud Cover: 77%
      • Precip: 0%
      • Hours of Precip: 0
      More
    • Today

      May 28

      70° /54°
      Low clouds, then sun
      • Fair
      • for stargazing
      • Cloud Cover: 64%
      • Precip: 0%
      • Hours of Precip: 0
      More
    • Mon

      May 29

      67° /53°F
      Partly sunny
      • Poor
      • for stargazing
      • Cloud Cover: 90%
      • Precip: 0%
      • Hours of Precip: 0
    • Tue

      May 30

      65° /55°
      Low clouds break for some sun
      • Poor
      • for stargazing
      • Cloud Cover: 95%
      • Precip: 1%
      • Hours of Precip: 0
      More
    • Wed

      May 31

      70° /54°
      Partly sunny
      • Poor
      • for stargazing
      • Cloud Cover: 73%
      • Precip: 4%
      • Hours of Precip: 0
      More

    Day

    67°Hi RealFeel® 71° Precipitation 0%
    Areas of low clouds, then some sun
    • WNW 10 mph
    • Gusts: 17 mph
    • Max UV Index: 7 (High)
    • 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

    53°Lo RealFeel® 50° Precipitation 0%
    Low clouds
    • WSW 8 mph
    • Gusts: 16 mph
    • Max UV Index: N/A
    • Thunderstorms: 0%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Temperature History

    more Historical Weather Data >
      Today Normal Record 5/29/2016
    High 67° 73° N/A 77°
    Low 53° 53° N/A 51°

    Sunrise/Sunset

    • Sunrise: 5:50 AM
    • Sunset: 8:21 PM
    • Duration: 14:31 hr

    Moonrise/Moonset

    • Moonrise: 8:56 AM
    • Moonset: 11:31 PM
    • Duration: 14:35 hr
    Astronomy

    Solunar Information for Castro Valley, CA

    Thu, Jun 1
    First
    Fri, Jun 9
    Full
    Sat, Jun 17
    Last
    Sat, Jun 24
    New

    Mon. Stargazing