10-Day Weather Forecast - Castro Valley, CA

Mostly cloudy in the morning then becoming sunny. Highs in the mid 60s to lower 70s. Light winds. . . Becoming west around 5 mph in the afternoon.

Partly cloudy. Patchy fog after midnight. Lows around 50. West winds around 5 mph in the evening. . . Becoming light.

Partly cloudy in the morning then becoming sunny. Patchy fog in the morning. Highs in the 60s. Light winds. . . Becoming northwest 5 to 10 mph in the afternoon.

Mostly clear in the evening then becoming mostly cloudy. Patchy fog after midnight. Lows in the upper 40s. West winds around 5 mph in the evening. . . Becoming light.

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

Mostly cloudy. Patchy fog. A slight chance of rain. Lows in the lower 50s.

Mostly cloudy. Patchy fog. Highs in the lower 60s.

Mostly cloudy. A slight chance of rain. Lows in the upper 40s.

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

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

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

Partly cloudy. A slight chance of rain. Lows in the lower to mid 40s.

Partly cloudy. Highs in the upper 50s to mid 60s.

Clear. Low temperature around 43F. Dew point will be around 41F with an average humidity of 83%. Winds will be 4 mph from the SW.

Sunny. High temperature around 56F. Dew point will be around 43F with an average humidity of 69%. Winds will be 6 mph from the W.

Clear. Low temperature around 42F. Dew point will be around 39F with an average humidity of 79%. Winds will be 5 mph from the W.

Mostly cloudy with a chance of rain. Chance of precipitation 35%. High temperature around 53F. Dew point will be around 41F with an average humidity of 70%. Winds will be 7 mph from the SW.

Cloudy with a chance of rain. Chance of precipitation 50%. Low temperature around 41F. Dew point will be around 39F with an average humidity of 83%. Winds will be 6 mph from the SW.