10-Day Weather Forecast - Portola Valley, CA

Mostly cloudy in the morning then becoming sunny. Highs in the upper 60s to mid 70s. West winds 10 to 20 mph.

Mostly clear in the evening then becoming mostly cloudy. Lows in the mid 50s. Southwest winds 10 to 20 mph.

Mostly cloudy in the morning then becoming sunny. Highs in the 70s. West winds 5 to 15 mph.

Clear in the evening then becoming partly cloudy. Lows in the mid 50s.

Mostly cloudy in the morning then becoming sunny. Highs in the 70s to lower 80s.

Mostly clear in the evening then becoming partly cloudy. Lows in the upper 50s.

Mostly cloudy. Highs in the upper 60s to lower 80s. Lows in the upper 50s.

Mostly cloudy. Highs in the upper 60s to lower 80s. Lows in the upper 50s.

Mostly cloudy. Highs in the upper 60s to lower 80s. Lows in the upper 50s.

Partly cloudy. Lows around 60. Highs in the 70s to lower 80s.

Partly cloudy. Lows around 60. Highs in the 70s to lower 80s.

Clear. Low temperature around 59F. Dew point will be around 52F with an average humidity of 67%. Winds will be 2 mph from the W.

Sunny. High temperature around 81F. Dew point will be around 54F with an average humidity of 52%. Winds will be 4 mph from the W.

Clear. Low temperature around 59F. Dew point will be around 52F with an average humidity of 67%. Winds will be 2 mph from the W.

Sunny. High temperature around 80F. Dew point will be around 55F with an average humidity of 52%. Winds will be 4 mph from the W.

Clear. Low temperature around 57F. Dew point will be around 53F with an average humidity of 72%. Winds will be 2 mph from the W.

Sunny. High temperature around 80F. Dew point will be around 56F with an average humidity of 54%. Winds will be 4 mph from the W.

Clear. Low temperature around 57F. Dew point will be around 53F with an average humidity of 72%. Winds will be 2 mph from the W.