Castro Valley, California | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast night icon
    Night
    Mostly Clear
    53°
    Wednesday 4/17
    Forecast night icon
    53°
    Mostly Clear
    Hourly
    Night Details
    Mostly clear. Lows in the lower 50s. West winds 5 to 10 mph.
  • Forecast day icon
    Thursday
    Partly Cloudy
    77°
    Forecast night icon
    Night
    Mostly Cloudy
    52°
    Thursday 4/18
    Day
    77°
    Partly Cloudy
    Forecast day icon
    Night
    52°
    Mostly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy in the morning then becoming partly cloudy. Highs in the 70s. Light winds. . . Becoming northwest 5 to 15 mph in the afternoon.
    Night Details
    Mostly cloudy. Lows in the lower 50s. West winds 5 to 15 mph.
  • Forecast day icon
    Friday
    Mostly Cloudy
    67°
    Forecast night icon
    Night
    Drizzle
    48°
    Friday 4/19
    Day
    67°
    Mostly Cloudy
    Forecast day icon
    Night
    48°
    Drizzle
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy in the morning then becoming sunny. Highs in the mid 60s to lower 70s. West winds 5 to 15 mph.
    Night Details
    Mostly clear in the evening then becoming partly cloudy. Patchy drizzle. Lows around 50. West winds 10 to 20 mph. . . Becoming southwest 5 to 10 mph after midnight.
  • Forecast day icon
    Saturday
    Sunny
    70°
    Forecast night icon
    Night
    Mostly Clear
    47°
    Saturday 4/20
    Day
    70°
    Sunny
    Forecast day icon
    Night
    47°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Sunny. Highs in the mid 60s to lower 70s.
    Night Details
    Mostly clear. Lows in the lower 50s. Highs in the upper 60s to mid 70s.
  • Forecast day icon
    Sunday
    Mostly Sunny
    75°
    Forecast night icon
    Night
    Partly Cloudy
    49°
    Sunday 4/21
    Day
    75°
    Mostly Sunny
    Forecast day icon
    Night
    49°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly clear. Lows in the lower 50s. Highs in the upper 60s to mid 70s.
    Night Details
    Partly cloudy. Lows in the lower 50s. Highs in the mid 60s to lower 70s.
  • Forecast day icon
    Monday
    Partly Cloudy
    68°
    Forecast night icon
    Night
    Partly Cloudy
    49°
    Monday 4/22
    Day
    68°
    Partly Cloudy
    Forecast day icon
    Night
    49°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Partly cloudy. Lows in the lower 50s. Highs in the mid 60s to lower 70s.
    Night Details
    Partly cloudy. Lows in the lower 50s. Highs in the mid 60s to lower 70s.
  • Forecast day icon
    Tuesday
    Partly Cloudy
    61°
    Forecast night icon
    Night
    Partly Cloudy
    49°
    Tuesday 4/23
    Day
    61°
    Partly Cloudy
    Forecast day icon
    Night
    49°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Partly cloudy. Lows in the lower 50s. Highs in the mid 60s to lower 70s.
    Night Details
    Partly cloudy. Lows in the lower 50s. Highs in the mid 60s to lower 70s.
  • Forecast day icon
    Wednesday
    Partly Cloudy
    65°
    Forecast night icon
    Night
    Mostly Clear
    48°
    Wednesday 4/24
    Day
    65°
    Partly Cloudy
    Forecast day icon
    Night
    48°
    Mostly Clear
    Forecast night icon
    Day Details
    Partly cloudy. Lows in the lower 50s. Highs in the mid 60s to lower 70s.
    Night Details
    Mostly clear. Low temperature around 48F. Dew point will be around 47F with an average humidity of 82%. Winds will be 7 mph from the W.
  • Forecast day icon
    Thursday
    Mostly Sunny
    64°
    Forecast night icon
    Night
    Mostly Clear
    49°
    Thursday 4/25
    Day
    64°
    Mostly Sunny
    Forecast day icon
    Night
    49°
    Mostly Clear
    Forecast night icon
    Day Details
    Mostly sunny. High temperature around 64F. Dew point will be around 49F with an average humidity of 68%. Winds will be 8 mph from the W.
    Night Details
    Mostly clear. Low temperature around 49F. Dew point will be around 48F with an average humidity of 83%. Winds will be 7 mph from the W.
  • Forecast day icon
    Friday
    Sunny
    65°
    Forecast night icon
    Night
    Clear
    49°
    Friday 4/26
    Day
    65°
    Sunny
    Forecast day icon
    Night
    49°
    Clear
    Forecast night icon
    Day Details
    Sunny. High temperature around 65F. Dew point will be around 50F with an average humidity of 68%. Winds will be 7 mph from the W.
    Night Details
    Clear. Low temperature around 49F. Dew point will be around 47F with an average humidity of 80%. Winds will be 6 mph from the W.