Castro Valley, California | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast day icon
    Friday
    Sunny
    66°
    Forecast night icon
    Night
    Mostly Cloudy
    48°
    Friday 4/19
    Day
    66°
    Sunny
    Forecast day icon
    Night
    48°
    Mostly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Sunny. Highs in the mid 60s to lower 70s. Northwest winds around 5 mph increasing to 10 to 20 mph in the afternoon.
    Night Details
    Mostly clear in the evening then becoming mostly cloudy. Lows around 50. West winds 5 to 15 mph.
  • Forecast day icon
    Saturday
    Partly Cloudy
    70°
    Forecast night icon
    Night
    Mostly Clear
    50°
    Saturday 4/20
    Day
    70°
    Partly Cloudy
    Forecast day icon
    Night
    50°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Partly cloudy in the morning then becoming sunny. Highs near 70. Southwest winds 5 to 10 mph. . . Becoming west 10 to 20 mph in the afternoon.
    Night Details
    Mostly clear. Lows around 50. West winds 10 to 20 mph.
  • Forecast day icon
    Sunday
    Sunny
    76°
    Forecast night icon
    Night
    Mostly Clear
    53°
    Sunday 4/21
    Day
    76°
    Sunny
    Forecast day icon
    Night
    53°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Sunny. Highs in the 70s. West winds 5 to 15 mph.
    Night Details
    Mostly clear. Lows in the lower 50s.
  • Forecast day icon
    Monday
    Mostly Sunny
    78°
    Forecast night icon
    Night
    Mostly Clear
    49°
    Monday 4/22
    Day
    78°
    Mostly Sunny
    Forecast day icon
    Night
    49°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly clear. Highs in the 70s. Lows in the lower 50s.
    Night Details
    Mostly clear. Highs in the 70s. Lows in the lower 50s.
  • Forecast day icon
    Tuesday
    Partly Cloudy
    68°
    Forecast night icon
    Night
    Partly Cloudy
    51°
    Tuesday 4/23
    Day
    68°
    Partly Cloudy
    Forecast day icon
    Night
    51°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Partly cloudy. Highs in the mid to upper 60s. Lows in the lower 50s.
    Night Details
    Partly cloudy. Highs in the mid to upper 60s. Lows in the lower 50s.
  • Forecast day icon
    Wednesday
    Partly Cloudy
    66°
    Forecast night icon
    Night
    Partly Cloudy
    48°
    Wednesday 4/24
    Day
    66°
    Partly Cloudy
    Forecast day icon
    Night
    48°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy in the morning then becoming partly cloudy. Highs in the mid 60s.
    Night Details
    Partly cloudy in the evening then becoming mostly cloudy. Lows around 50.
  • Forecast day icon
    Thursday
    Partly Cloudy
    63°
    Forecast night icon
    Night
    Partly Cloudy
    47°
    Thursday 4/25
    Day
    63°
    Partly Cloudy
    Forecast day icon
    Night
    47°
    Partly Cloudy
    Forecast night icon
    Day Details
    Mostly cloudy in the morning then becoming partly cloudy. Highs in the lower 60s.
    Night Details
    Partly cloudy. Low temperature around 47F. Dew point will be around 48F with an average humidity of 87%. Winds will be 8 mph from the SW.
  • Forecast day icon
    Friday
    30% Chance of Rain
    62°
    Forecast night icon
    Night
    Clear
    46°
    Friday 4/26
    Day
    62°
    30% Chance of Rain
    Forecast day icon
    Night
    46°
    Clear
    Forecast night icon
    Day Details
    Mostly cloudy with a slight chance of rain. Chance of precipitation 25%. High temperature around 62F. Dew point will be around 50F with an average humidity of 76%. Winds will be 9 mph from the W.
    Night Details
    Clear. Low temperature around 46F. Dew point will be around 47F with an average humidity of 87%. Winds will be 8 mph from the W.
  • Forecast day icon
    Saturday
    Partly Cloudy
    65°
    Forecast night icon
    Night
    Clear
    46°
    Saturday 4/27
    Day
    65°
    Partly Cloudy
    Forecast day icon
    Night
    46°
    Clear
    Forecast night icon
    Day Details
    Partly cloudy. High temperature around 65F. Dew point will be around 49F with an average humidity of 69%. Winds will be 8 mph from the W.
    Night Details
    Clear. Low temperature around 46F. Dew point will be around 48F with an average humidity of 84%. Winds will be 7 mph from the SW.
  • Forecast day icon
    Sunday
    Sunny
    68°
    Forecast night icon
    Night
    Clear
    47°
    Sunday 4/28
    Day
    68°
    Sunny
    Forecast day icon
    Night
    47°
    Clear
    Forecast night icon
    Day Details
    Sunny. High temperature around 68F. Dew point will be around 50F with an average humidity of 66%. Winds will be 8 mph from the W.
    Night Details
    Clear. Low temperature around 47F. Dew point will be around 47F with an average humidity of 80%. Winds will be 8 mph from the W.