10 Day Weather - Castro Valley, CA

Sunny breezy. Highs near 70. Northwest winds 10 to 20 mph increasing to west 20 to 30 mph in the afternoon.

Mostly clear. Breezy. Lows in the lower 50s. West winds 20 to 30 mph decreasing to 10 to 20 mph after midnight.

Sunny. Highs in the upper 60s to mid 70s. West winds 5 to 10 mph increasing to 10 to 20 mph in the afternoon.

Clear in the evening then becoming partly cloudy. Lows in the lower 50s. West winds 10 to 20 mph.

Mostly cloudy in the morning then becoming sunny. Highs in the 60s to upper 70s.

Partly cloudy. Lows in the mid 50s. Highs in the 60s to upper 70s.

Partly cloudy. Lows in the mid 50s. Highs in the 60s to upper 70s.

Partly cloudy. Lows in the mid 50s. Highs in the 60s to upper 70s.

Partly cloudy. Lows in the mid 50s. Highs in the 60s to upper 70s.

Mostly clear. Lows in the mid 50s.

Partly cloudy in the morning then becoming sunny. Highs in the 60s to upper 70s.

Mostly clear. Lows in the mid 50s. Highs in the 60s to upper 70s.

Mostly clear. Lows in the mid 50s. Highs in the 60s to upper 70s.

Clear. Low temperature around 58F. Dew point will be around 53F with an average humidity of 78%. Winds will be 9 mph from the SW.

Sunny. High temperature around 74F. Dew point will be around 54F with an average humidity of 62%. Winds will be 10 mph from the W.

Clear. Low temperature around 57F. Dew point will be around 54F with an average humidity of 77%. Winds will be 8 mph from the SW.

Sunny. High temperature around 70F. Dew point will be around 54F with an average humidity of 61%. Winds will be 10 mph from the SW.

Mostly clear. Low temperature around 56F. Dew point will be around 54F with an average humidity of 80%. Winds will be 9 mph from the SW.

Mostly sunny. High temperature around 67F. Dew point will be around 53F with an average humidity of 65%. Winds will be 10 mph from the SW.

Mostly clear. Low temperature around 55F. Dew point will be around 54F with an average humidity of 84%. Winds will be 9 mph from the SW.