10-Day Weather Forecast - Castro Valley, CA

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  • 80|60°F
    Chance of Storms
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    Today

    80°F

    Mostly cloudy. A slight chance of showers and isolated thunderstorms. Highs in the mid 70s to lower 80s. West winds 5 to 15 mph.

    Tonight

    60°F

    Mostly cloudy. Isolated thunderstorms in the evening. A chance of showers. Lows in the mid 60s. West winds 10 to 15 mph. . . Becoming northwest around 5 mph after midnight.

    Hourly details
  • Day

    72°F

    Mostly cloudy in the morning then becoming partly cloudy. A slight chance of showers. Highs in the mid 70s to lower 80s. Southwest winds 5 to 10 mph.

    Night

    60°F

    Mostly clear in the evening then becoming partly cloudy. Lows in the lower 60s. West winds 10 to 15 mph decreasing to around 5 mph after midnight.

    Hourly details
  • Weekend Weather

  • Day

    80°F

    Partly cloudy in the morning then becoming sunny. Highs in the mid 70s to lower 80s. Light winds. . . Becoming west 10 to 15 mph in the afternoon.

    Night

    60°F

    Clear in the evening then becoming partly cloudy. Lows in the lower 60s.

    Hourly details
  • Day

    80°F

    Partly cloudy in the morning then becoming sunny. Highs in the mid 70s to lower 80s.

    Night

    60°F

    Mostly clear. Lows in the lower 60s. Highs in the 80s to lower 90s.

    Hourly details
  • Day

    92°F

    Mostly clear. Lows in the lower 60s. Highs in the 80s to lower 90s.

    Night

    65°F

    Mostly clear. Lows in the lower 60s. Highs in the 80s to lower 90s.

    Hourly details
  • Day

    85°F

    Mostly cloudy in the morning then becoming partly cloudy. A slight chance of showers. Highs in the upper 70s to mid 80s.

    Night

    65°F

    Partly cloudy. A slight chance of showers. Lows in the mid 60s.

    Hourly details
  • Day

    85°F

    Mostly cloudy in the morning then becoming partly cloudy. Highs in the mid 70s to lower 80s.

    Night

    61°F

    Clear. Low temperature around 61F. Dew point will be around 59F with an average humidity of 80%. Winds will be 6 mph from the W.

  • Day

    79°F

    Sunny. High temperature around 79F. Dew point will be around 60F with an average humidity of 68%. Winds will be 8 mph from the W.

    Night

    59°F

    Clear. Low temperature around 59F. Dew point will be around 58F with an average humidity of 80%. Winds will be 7 mph from the W.

  • Day

    74°F

    Sunny. High temperature around 74F. Dew point will be around 59F with an average humidity of 68%. Winds will be 8 mph from the W.

    Night

    58°F

    Clear. Low temperature around 58F. Dew point will be around 56F with an average humidity of 78%. Winds will be 6 mph from the W.

  • Weekend Weather

  • Day

    74°F

    Sunny. High temperature around 74F. Dew point will be around 56F with an average humidity of 64%. Winds will be 6 mph from the W.

    Night

    58°F

    Clear. Low temperature around 58F. Dew point will be around 54F with an average humidity of 73%. Winds will be 5 mph from the W.