Point Forecast: 2 Miles NNW Portola Valley CA
 37.42N 122.23W (Elev. 397 ft)
Last Update: 3:02 am PDT Jul 15, 2025
Tabular Forecast
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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)030405060708091011121314151617181920212223000102
Temperature (°F)565655545659626872757879808078767266626159575756
Dewpoint (°F)545453525455565859616261616260605955555555545454
Heat Index (°F)75788181827876
Surface Wind (mph)222222356778899877666553
Wind DirSSWSSWSSWSSWSSSSWSSWSSWSWSWSWSWSWSWSWSWSWSWSSWSSWSSWSSWSSW
Gust
Sky Cover (%)474949515140391921300130303030303030303037
Precipitation Potential (%)5577777733333317171717171717171717
Relative Humidity (%)939393939186797162605654545455596370768288929192
Rain----------------------------SChcSChcSChcSChcSChcSChcSChcSChcSChcSChc
Thunder------------------------------------------------

Date07/17
Hour (PDT)030405060708091011121314151617181920212223000102
Temperature (°F)565556555658626770737577787876747066636159575656
Dewpoint (°F)535354525454555858586060605958575554545454535353
Heat Index (°F)7577787877
Surface Wind (mph)333333356667778886663332
Wind DirSSWSSWSSWSSSSWSSWSWSWSWSWSWSWSWWSWWSWWSWWSWWSWWSWWSWWSWWSWSW
Gust
Sky Cover (%)464849535045431933333333366621212153
Precipitation Potential (%)17173333333333334444444444
Relative Humidity (%)929292929287787365605857545353555965717883878990
RainSChcSChc--------------------------------------------
Thunder------------------------------------------------

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