, °F

Personalized Forecasts

Featured Forecast

My Favorite Forecasts

    My Recent Locations

    • Wed

      May 3

      85° /57°
      Very warm with plenty of sun
      • Excellent
      • for stargazing
      • Cloud Cover: 8%
      • Precip: 0%
      • Hours of Precip: 0
      More
    • Thu

      May 4

      82° /53°F
      Mostly sunny and very warm
      • Fair
      • for stargazing
      • Cloud Cover: 49%
      • Precip: 1%
      • Hours of Precip: 0
    • Fri

      May 5

      69° /56°
      Partly sunny and cooler
      • Poor
      • for stargazing
      • Cloud Cover: 86%
      • Precip: 60%
      • Hours of Precip: 1
      More
    • Sat

      May 6

      73° /58°
      Sunshine and some clouds
      • Very Good
      • for stargazing
      • Cloud Cover: 43%
      • Precip: 2%
      • Hours of Precip: 0
      More
    • Sun

      May 7

      79° /53°
      Mostly sunny and very warm
      • Very Good
      • for stargazing
      • Cloud Cover: 4%
      • Precip: 0%
      • Hours of Precip: 0
      More

    Day

    82°Hi RealFeel® 86° Precipitation 0%
    Mostly sunny and remaining very warm
    • W 8 mph
    • Gusts: 14 mph
    • Max UV Index: 8 (Very 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® 46° Precipitation 1%
    Partly cloudy
    • WSW 8 mph
    • Gusts: 18 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 5/4/2016
    High 82° 69° N/A 69°
    Low 53° 50° N/A 54°

    Sunrise/Sunset

    • Sunrise: 6:10 AM
    • Sunset: 8:01 PM
    • Duration: 13:51 hr

    Moonrise/Moonset

    • Moonrise: 2:19 PM
    • Moonset: 3:38 AM
    • Duration: 13:19 hr
    Astronomy

    Solunar Information for Castro Valley, CA

    Wed, May 3
    First
    Wed, May 10
    Full
    Fri, May 19
    Last
    Thu, May 25
    New