10-Day Weather Forecast - Castro Valley, CA
Weekend Weather
- 66|48°FSunnyHourly details
Today
66°FSunny breezy. Highs in the mid 60s to lower 70s. West winds 10 to 20 mph increasing to 20 to 30 mph in the afternoon.
Tonight
48°FMostly clear. Breezy. Lows around 50. West winds 20 to 30 mph. . . Becoming southwest 10 to 20 mph after midnight.
- 71|51°FSunnyHourly details
Day
71°FSunny. Highs in the upper 60s to mid 70s. Southwest winds around 5 mph increasing to west 10 to 20 mph in the afternoon.
Night
51°FMostly clear in the evening then becoming partly cloudy. Lows in the lower 50s. West winds 10 to 20 mph.
- 67|58°FMostly CloudyHourly details
Day
67°FMostly cloudy. Highs in the mid 60s to lower 70s. West winds 10 to 20 mph.
Night
58°FMostly cloudy. A slight chance of rain. Lows in the upper 50s.
- 71|54°FPartly CloudyHourly details
Day
71°FMostly cloudy in the morning then becoming partly cloudy. Highs near 70.
Night
54°FMostly clear. Lows in the lower 50s. Highs in the 70s to lower 80s.
- 84|60°FMostly SunnyHourly details
Day
84°FMostly clear. Lows in the lower 50s. Highs in the 70s to lower 80s.
Night
60°FClear. Lows in the upper 50s. Highs in the upper 70s to mid 80s.
- 91|60°FSunnyHourly details
Day
91°FClear. Lows in the upper 50s. Highs in the upper 70s to mid 80s.
Night
60°FClear. Lows in the upper 50s. Highs in the upper 70s to mid 80s.
- 89|59°FSunny
Day
89°FClear. Lows in the upper 50s. Highs in the upper 70s to mid 80s.
Night
59°FClear. Low temperature around 59F. Dew point will be around 48F with an average humidity of 56%. Winds will be 8 mph from the W.
Weekend Weather
- 89|62°FMostly Sunny
Day
89°FMostly sunny. High temperature around 89F. Dew point will be around 54F with an average humidity of 40%. Winds will be 9 mph from the W.
Night
62°FClear. Low temperature around 62F. Dew point will be around 51F with an average humidity of 54%. Winds will be 7 mph from the SW.
- 86|60°FSunny
Day
86°FSunny. High temperature around 86F. Dew point will be around 53F with an average humidity of 40%. Winds will be 9 mph from the W.
Night
60°FClear. Low temperature around 60F. Dew point will be around 51F with an average humidity of 57%. Winds will be 8 mph from the SW.
- 85|59°FSunny
Day
85°FSunny. High temperature around 85F. Dew point will be around 54F with an average humidity of 43%. Winds will be 9 mph from the W.
Night
59°FClear. Low temperature around 59F. Dew point will be around 53F with an average humidity of 64%. Winds will be 9 mph from the SW.













