10-Day Weather Forecast - Castro Valley, CA

Sunny. Highs in the mid 60s to lower 70s. Northeast winds 5 to 10 mph.

Mostly clear. Lows in the 40s. Northeast winds 5 to 10 mph.

Sunny. Highs around 70. Northeast winds 5 to 10 mph.

Mostly clear. Lows in the upper 40s. East winds 5 to 10 mph.

Partly cloudy. Highs in the upper 60s.

Mostly cloudy. Lows in the lower 50s. Highs in the mid 60s.

Mostly cloudy. Lows in the lower 50s. Highs in the mid 60s.

Partly cloudy. Lows around 50. Highs in the 60s.

Partly cloudy. Lows around 50. Highs in the 60s.

Partly cloudy in the evening then becoming mostly cloudy. A slight chance of rain. Lows around 50.

Mostly cloudy. A chance of rain. Highs in the lower 60s. Lows in the upper 40s.

Mostly cloudy. A chance of rain. Highs in the lower 60s. Lows in the upper 40s.

Mostly cloudy. A chance of rain. Highs in the lower 60s. Lows in the upper 40s.

Mostly cloudy with a slight chance of rain. Chance of precipitation 30%. Low temperature around 43F. Dew point will be around 42F with an average humidity of 88%. Winds will be 3 mph from the W.

Partly cloudy with a slight chance of rain. Chance of precipitation 25%. High temperature around 53F. Dew point will be around 43F with an average humidity of 77%. Winds will be 4 mph from the W.

Partly cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 40F. Dew point will be around 40F with an average humidity of 87%. Winds will be 2 mph from the NW.

Mostly sunny with a slight chance of rain. Chance of precipitation 25%. High temperature around 52F. Dew point will be around 42F with an average humidity of 75%. Winds will be 2 mph from the W.

Clear. Low temperature around 41F. Dew point will be around 41F with an average humidity of 89%. Winds will be 2 mph from the SE.