10-Day Weather Forecast - Portola Valley, CA

Mostly cloudy in the morning then becoming sunny. A slight chance of rain in the morning. Highs in the mid 60s. West winds 5 to 15 mph.

Mostly clear in the evening then becoming mostly cloudy. Lows in the lower 50s. Northwest winds 10 to 20 mph. . . Becoming west 5 to 10 mph after midnight.

Mostly cloudy in the morning then becoming sunny. Highs in the lower 60s. West winds 5 to 10 mph increasing to 10 to 20 mph in the afternoon.

Partly cloudy in the evening then becoming mostly cloudy. Lows around 50. West winds 5 to 15 mph.

Mostly cloudy in the morning then becoming sunny. Highs in the mid 60s.

Clear. Lows in the 40s. Highs in the mid 60s.

Clear. Lows in the 40s. Highs in the mid 60s.

Mostly clear. Lows in the upper 40s.

Sunny. Highs near 70.

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

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

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

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

Clear. Low temperature around 49F. Dew point will be around 47F with an average humidity of 79%. Winds will be 2 mph from the NW.

Sunny. High temperature around 69F. Dew point will be around 46F with an average humidity of 51%. Winds will be 4 mph from the NW.

Clear. Low temperature around 48F. Dew point will be around 44F with an average humidity of 71%. Winds will be 2 mph from the NW.

Sunny. High temperature around 68F. Dew point will be around 44F with an average humidity of 49%. Winds will be 2 mph from the N.

Clear. Low temperature around 48F. Dew point will be around 43F with an average humidity of 70%. Winds will be 1 mph from the E.