10-Day Weather Forecast - Portola Valley, CA

Mostly cloudy in the morning then becoming partly cloudy. Patchy fog in the morning. Highs in the upper 50s. Northwest winds 5 to 10 mph.

Partly cloudy in the evening then becoming mostly cloudy. Areas of fog after midnight. Lows in the lower 50s. West winds 5 to 10 mph. . . Becoming southwest after midnight.

Mostly cloudy. Areas of fog in the morning. A slight chance of rain. Highs in the mid 60s. Light winds. . . Becoming west 5 to 10 mph in the afternoon. Chance of rain 20 percent.

Patchy fog. A chance of rain in the evening. Rain likely after midnight. Lows in the mid 50s. West winds 5 to 10 mph. . . Becoming southwest after midnight. Chance of rain 70 percent.

Mostly cloudy. Patchy fog. A chance of rain. Highs in the lower 60s.

Partly cloudy in the evening then becoming mostly cloudy. Patchy fog. A slight chance of rain. Lows around 50.

Mostly cloudy. Areas of fog. A slight chance of rain. Highs in the lower 60s.

Mostly cloudy. Patchy fog. A chance of rain. Lows in the lower 50s.

Mostly cloudy. A chance of rain. Highs in the lower 60s.

Rain likely. Lows in the lower 50s.

Mostly cloudy. A chance of rain. Highs in the lower 60s. Lows in the lower 50s.

Mostly cloudy. A chance of rain. Highs in the lower 60s. Lows in the lower 50s.

Rain likely. Highs in the lower 60s.

Cloudy with probable rain. Chance of precipitation 65%. Low temperature around 43F. Dew point will be around 43F with an average humidity of 100%. Winds will be 9 mph from the S.

Cloudy with a chance of rain. Chance of precipitation 55%. High temperature around 48F. Dew point will be around 46F with an average humidity of 100%. Winds will be 7 mph from the S.

Cloudy with a chance of rain. Chance of precipitation 55%. Low temperature around 40F. Dew point will be around 40F with an average humidity of 99%. Winds will be 6 mph from the S.

Mostly cloudy with a chance of rain. Chance of precipitation 50%. High temperature around 47F. Dew point will be around 44F with an average humidity of 97%. Winds will be 6 mph from the S.

Partly cloudy with a chance of rain. Chance of precipitation 55%. Low temperature around 37F. Dew point will be around 37F with an average humidity of 96%. Winds will be 5 mph from the S.