National Weather Service Forecast for: 6 Miles SW Portola Valley CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:24 pm PST Dec 17, 2025
 
Tonight

Tonight: Patchy drizzle after 8pm. Patchy fog before 9pm. Otherwise, partly cloudy, with a low around 46. Calm wind.
Patchy
Drizzle and
Patchy Fog
 Thursday

Thursday: Mostly sunny, with a high near 64. Light and variable wind.
Mostly Sunny

 Thursday
Night
Thursday Night: A 30 percent chance of rain, mainly after 10pm. Mostly cloudy, with a low around 49. Calm wind.
Chance Rain

 Friday

Friday: Rain, mainly after 10am. High near 63. Calm wind becoming south southwest 5 to 7 mph in the morning. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Rain

 Friday
Night
Friday Night: Rain, mainly before 4am. Low around 52. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain

 Saturday

Saturday: Rain, mainly after 10am. High near 62. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain

 Saturday
Night
Saturday Night: Rain before 10pm, then showers and possibly a thunderstorm after 10pm. Low around 53. Chance of precipitation is 90%.
Showers

 Sunday

Sunday: Showers and possibly a thunderstorm. Cloudy, with a high near 62.
Showers

 Sunday
Night
Sunday Night: Rain. Cloudy, with a low around 51.
Rain
Lo 46 °F Hi 64 °F Lo 49 °F Hi 63 °F Lo 52 °F Hi 62 °F Lo 53 °F Hi 62 °F Lo 51 °F

 

Tonight
 
 Patchy drizzle after 8pm. Patchy fog before 9pm. Otherwise, partly cloudy, with a low around 46. Calm wind.
Thursday
 
 Mostly sunny, with a high near 64. Light and variable wind.
Thursday Night
 
 A 30 percent chance of rain, mainly after 10pm. Mostly cloudy, with a low around 49. Calm wind.
Friday
 
 Rain, mainly after 10am. High near 63. Calm wind becoming south southwest 5 to 7 mph in the morning. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
 
 Rain, mainly before 4am. Low around 52. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
 
 Rain, mainly after 10am. High near 62. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
 
 Rain before 10pm, then showers and possibly a thunderstorm after 10pm. Low around 53. Chance of precipitation is 90%.
Sunday
 
 Showers and possibly a thunderstorm. Cloudy, with a high near 62.
Sunday Night
 
 Rain. Cloudy, with a low around 51.
Monday
 
 Rain likely. Mostly cloudy, with a high near 61.
Monday Night
 
 Rain likely. Cloudy, with a low around 49.
Tuesday
 
 Rain. Mostly cloudy, with a high near 60.
Tuesday Night
 
 Rain. The rain could be heavy at times. Cloudy, with a low around 49.
Wednesday
 
 Rain likely. Mostly cloudy, with a high near 60.

 

Forecast from NOAA-NWS for 6 Miles SW Portola Valley CA.