Point Forecast: 4 Miles S Portola Valley CA
 37.33N 122.21W (Elev. 2231 ft)
Last Update: 1:26 pm PDT Jul 15, 2025
Tabular Forecast
[hide menu]Get as XML
Weather ElementsWeather/Precipitation
Temperature (°F)
Dewpoint (°F)
Heat Index (°F)

Surface Wind  
Sky Cover (%)
Precipitation Potential (%)
Relative Humidity (%)
Rain
Thunder
Fog
Trans. Wind  
20ft Wind  

48-Hour Period Starting:       Back 2 Days  

Date07/1507/16
Hour (PDT)222300010203040506070809101112131415161718192021
Temperature (°F)616263636262626261605958606264656766666564636262
Dewpoint (°F)474645454544454544444546505254545554535251504948
Heat Index (°F)
Surface Wind (mph)666666676666666667766665
Wind DirSSSSSWSSWSSWSSWSSWSSSSSSSSWSSWSSWSWSWSSWSWSWSWSW
Gust
Sky Cover (%)484949515050535052534850324421133131237
Precipitation Potential (%)288888833333311111111111
Relative Humidity (%)595552525352545454545865706970666667636363636361
Rain------------------------------------------------
Thunder------------------------------------------------

Date07/17
Hour (PDT)222300010203040506070809101112131415161718192021
Temperature (°F)626262626160605960616263646668697070696867666565
Dewpoint (°F)474645444443424242434547505254555656555453525049
Heat Index (°F)
Surface Wind (mph)555555533333333355566633
Wind DirSSWSSWSSWSSWSSWSSWSSWSSSSSWSSWSSWWSWWSWWSWWWWWWWWW
Gust
Sky Cover (%)363535354040405252523030305552225551515
Precipitation Potential (%)166666688888800000000000
Relative Humidity (%)585554535252535353525356596262626161616161605956
Rain------------------------------------------------
Thunder------------------------------------------------

Additional Forecasts and Information
International System of UnitsForecast Discussion
7-Day ForecastHourly Weather Graph
River Stage Summary24 Hour Precipitation Summary
NWS Office Map