Castro Valley, California | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast day icon
    Thursday
    Sunny
    85°
    Forecast night icon
    Night
    Clear
    54°
    Thursday 5/9
    Day
    85°
    Sunny
    Forecast day icon
    Night
    54°
    Clear
    Forecast night icon
    Hourly
    Day Details
    Sunny. Highs in the 80s. Northeast winds 5 to 15 mph.
    Night Details
    Clear. Lows in the upper 50s. Northwest winds 10 to 15 mph. . . Becoming east around 5 mph after midnight.
  • Forecast day icon
    Friday
    Sunny
    83°
    Forecast night icon
    Night
    Clear
    52°
    Friday 5/10
    Day
    83°
    Sunny
    Forecast day icon
    Night
    52°
    Clear
    Forecast night icon
    Hourly
    Day Details
    Sunny. Highs in the upper 70s to mid 80s. Northwest winds 5 to 10 mph.
    Night Details
    Clear. Lows in the upper 50s. West winds 10 to 20 mph. . . Becoming southwest 5 to 10 mph after midnight.
  • Forecast day icon
    Saturday
    Sunny
    81°
    Forecast night icon
    Night
    Mostly Clear
    50°
    Saturday 5/11
    Day
    81°
    Sunny
    Forecast day icon
    Night
    50°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Sunny. Highs in the 70s to mid 80s. Southwest winds up to 5 mph increasing to west 10 to 15 mph in the afternoon.
    Night Details
    Mostly clear. Lows in the mid 50s.
  • Forecast day icon
    Sunday
    Mostly Sunny
    75°
    Forecast night icon
    Night
    Mostly Clear
    48°
    Sunday 5/12
    Day
    75°
    Mostly Sunny
    Forecast day icon
    Night
    48°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly clear. Highs in the upper 60s to lower 80s. Lows in the lower 50s.
    Night Details
    Mostly clear. Highs in the upper 60s to lower 80s. Lows in the lower 50s.
  • Forecast day icon
    Monday
    Mostly Sunny
    73°
    Forecast night icon
    Night
    Mostly Clear
    49°
    Monday 5/13
    Day
    73°
    Mostly Sunny
    Forecast day icon
    Night
    49°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly clear. Highs in the upper 60s to lower 80s. Lows in the lower 50s.
    Night Details
    Mostly clear. Highs in the upper 60s to lower 80s. Lows in the lower 50s.
  • Forecast day icon
    Tuesday
    Mostly Sunny
    73°
    Forecast night icon
    Night
    Mostly Clear
    50°
    Tuesday 5/14
    Day
    73°
    Mostly Sunny
    Forecast day icon
    Night
    50°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly clear. Highs in the upper 60s to lower 80s. Lows in the lower 50s.
    Night Details
    Mostly clear. Highs in the upper 60s to lower 80s. Lows in the lower 50s.
  • Forecast day icon
    Wednesday
    Mostly Sunny
    73°
    Forecast night icon
    Night
    Partly Cloudy
    53°
    Wednesday 5/15
    Day
    73°
    Mostly Sunny
    Forecast day icon
    Night
    53°
    Partly Cloudy
    Forecast night icon
    Day Details
    Mostly clear. Highs in the upper 60s to lower 80s. Lows in the lower 50s.
    Night Details
    Partly cloudy. Low temperature around 53F. Dew point will be around 51F with an average humidity of 79%. Winds will be 8 mph from the W.
  • Forecast day icon
    Thursday
    Sunny
    74°
    Forecast night icon
    Night
    Clear
    49°
    Thursday 5/16
    Day
    74°
    Sunny
    Forecast day icon
    Night
    49°
    Clear
    Forecast night icon
    Day Details
    Sunny. High temperature around 74F. Dew point will be around 51F with an average humidity of 58%. Winds will be 9 mph from the W.
    Night Details
    Clear. Low temperature around 49F. Dew point will be around 49F with an average humidity of 81%. Winds will be 8 mph from the SW.
  • Forecast day icon
    Friday
    Sunny
    68°
    Forecast night icon
    Night
    Clear
    47°
    Friday 5/17
    Day
    68°
    Sunny
    Forecast day icon
    Night
    47°
    Clear
    Forecast night icon
    Day Details
    Sunny. High temperature around 68F. Dew point will be around 49F with an average humidity of 61%. Winds will be 9 mph from the W.
    Night Details
    Clear. Low temperature around 47F. Dew point will be around 48F with an average humidity of 86%. Winds will be 8 mph from the W.
  • Forecast day icon
    Saturday
    Sunny
    64°
    Forecast night icon
    Night
    Clear
    47°
    Saturday 5/18
    Day
    64°
    Sunny
    Forecast day icon
    Night
    47°
    Clear
    Forecast night icon
    Day Details
    Sunny. High temperature around 64F. Dew point will be around 48F with an average humidity of 64%. Winds will be 9 mph from the W.
    Night Details
    Clear. Low temperature around 47F. Dew point will be around 48F with an average humidity of 89%. Winds will be 8 mph from the W.