10-Day Weather Forecast - Castro Valley, CA

Showers likely in the morning. A chance of thunderstorms. Showers in the afternoon. Some thunderstorms may produce small hail. Highs in the lower 60s. South winds 5 to 10 mph. . . Becoming southwest 10 to 20 mph in the afternoon.

Showers likely and a slight chance of thunderstorms in the evening then a chance of rain after midnight. Some thunderstorms may produce small hail in the evening. Lows in the lower 50s. Southwest winds 10 to 20 mph. . . Becoming 5 to 10 mph after midnight.

Mostly cloudy in the morning then becoming partly cloudy. A chance of rain in the morning then a slight chance of rain in the afternoon. Highs in the mid 60s. Southwest winds around 5 mph. . . Becoming west in the afternoon. Chance of rain 30 percent.

Mostly clear. Lows in the upper 40s. Northwest winds 5 to 15 mph.

Partly cloudy in the morning then becoming sunny. Highs in the upper 60s.

Partly cloudy in the evening then becoming mostly cloudy. Lows around 50.

Mostly cloudy in the morning then becoming partly cloudy. Highs in the mid 60s to lower 70s.

Partly cloudy. Lows in the lower 50s.

Mostly cloudy in the morning then becoming partly cloudy. Highs in the mid 60s to lower 70s.

Partly cloudy in the evening then becoming mostly cloudy. Lows in the lower 50s.

Mostly cloudy in the morning then becoming partly cloudy. Highs in the upper 60s.

Partly cloudy. Lows in the lower 50s. Highs in the upper 60s.

Partly cloudy. Lows in the lower 50s. Highs in the upper 60s.

Partly cloudy. Low temperature around 51F. Dew point will be around 46F with an average humidity of 76%. Winds will be 7 mph from the W.

Partly cloudy. High temperature around 67F. Dew point will be around 49F with an average humidity of 62%. Winds will be 7 mph from the W.

Clear. Low temperature around 51F. Dew point will be around 47F with an average humidity of 75%. Winds will be 6 mph from the W.

Mostly cloudy. High temperature around 69F. Dew point will be around 50F with an average humidity of 62%. Winds will be 7 mph from the W.

Clear. Low temperature around 51F. Dew point will be around 48F with an average humidity of 75%. Winds will be 7 mph from the W.