10-Day Weather Forecast - Portola Valley, CA

Mostly cloudy. Breezy. A slight chance of showers in the morning then a chance of showers in the afternoon. Highs in the lower 60s. Southeast winds 5 to 15 mph increasing to 20 to 30 mph in the afternoon.

Breezy showers. Lows in the mid 50s. Southeast winds 20 to 30 mph. . . Becoming south 10 to 20 mph after midnight.

Breezy showers. Highs in the lower 60s. South winds 10 to 20 mph increasing to 20 to 30 mph in the afternoon.

Showers and a slight chance of thunderstorms. Lows in the lower 50s.

Showers and a slight chance of thunderstorms. Highs in the upper 50s.

Showers. Lows around 50.

Showers. Highs in the upper 50s.

Showers likely. Lows in the mid 40s.

Mostly cloudy in the morning then becoming partly cloudy. A chance of showers. Highs in the upper 50s.

Mostly cloudy. A slight chance of showers. Lows in the mid 40s. Highs in the upper 50s.

Mostly cloudy. A slight chance of showers. Lows in the mid 40s. Highs in the upper 50s.

Partly cloudy with a chance of rain. Chance of precipitation 35%. Low temperature around 42F. Dew point will be around 42F with an average humidity of 91%. Winds will be 5 mph from the NW.

Partly cloudy with a chance of rain. Chance of precipitation 40%. High temperature around 52F. Dew point will be around 40F with an average humidity of 74%. Winds will be 11 mph from the NW.

Clear. Low temperature around 39F. Dew point will be around 36F with an average humidity of 82%. Winds will be 9 mph from the NW.

Sunny. High temperature around 50F. Dew point will be around 37F with an average humidity of 68%. Winds will be 9 mph from the N.

Clear. Low temperature around 37F. Dew point will be around 33F with an average humidity of 78%. Winds will be 7 mph from the N.

Sunny. High temperature around 50F. Dew point will be around 34F with an average humidity of 63%. Winds will be 7 mph from the N.

Clear. Low temperature around 37F. Dew point will be around 32F with an average humidity of 74%. Winds will be 7 mph from the N.