10-Day Weather Forecast - Portola Valley, CA

Sunny. Highs in the mid 70s to lower 80s. South winds up to 5 mph increasing to west 10 to 20 mph in the afternoon.

Mostly clear. Lows in the upper 50s. Southwest winds 10 to 20 mph.

Partly cloudy in the morning then becoming sunny. Highs in the 70s to lower 80s. Southwest winds 5 to 10 mph.. becoming west 10 to 20 mph in the afternoon.

Mostly clear in the evening then becoming partly cloudy. Lows in the upper 50s. West winds 10 to 20 mph..becoming southwest 5 to 10 mph after midnight.

Partly cloudy in the morning then becoming sunny. Highs in the lower to mid 70s.

Partly cloudy. Lows in the upper 50s.

Partly cloudy. Highs in the mid to upper 70s.

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

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

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

Partly cloudy. Highs in the 70s to lower 80s.

Partly cloudy. Lows in the upper 50s.

Partly cloudy. Highs in the 70s to lower 80s.

Partly cloudy. Low temperature around 51F. Dew point will be around 51F with an average humidity of 84%. Winds will be 2 mph from the W.

Sunny. High temperature around 79F. Dew point will be around 53F with an average humidity of 55%. Winds will be 4 mph from the NW.

Clear. Low temperature around 50F. Dew point will be around 52F with an average humidity of 86%. Winds will be 2 mph from the W.

Sunny. High temperature around 79F. Dew point will be around 53F with an average humidity of 57%. Winds will be 3 mph from the NW.

Clear. Low temperature around 51F. Dew point will be around 52F with an average humidity of 84%. Winds will be 2 mph from the W.

Sunny. High temperature around 80F. Dew point will be around 53F with an average humidity of 55%. Winds will be 3 mph from the W.

Clear. Low temperature around 52F. Dew point will be around 53F with an average humidity of 82%. Winds will be 2 mph from the W.