Point Forecast: Castro Valley CA
 37.69N 122.05W (Elev. 364 ft)
Last Update: 1:26 pm 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)161718192021222300010203040506070809101112131415
Temperature (°F)737270656258585757565656565656565657606467707172
Dewpoint (°F)595959565555545454545354545454545455565759585960
Heat Index (°F)
Surface Wind (mph)1010101010999887777666677991010
Wind DirWWWWWWWWWWWWWWWSWWSWWSWWSWWWWWWW
Gust1818
Sky Cover (%)2227213651627082838282869088837248188522
Precipitation Potential (%)155555522222233333322222
Relative Humidity (%)606468727887879189909191929393939391867974666565
Rain------------------------------------------------
Thunder------------------------------------------------

Date07/17
Hour (PDT)161718192021222300010203040506070809101112131415
Temperature (°F)717068646158575656565656565656565760636670737575
Dewpoint (°F)595858565555545454545454545454545556585960606060
Heat Index (°F)7575
Surface Wind (mph)101010109997776663335557771010
Wind DirWWWWWWWWWWWSWWSWWSWWSWWSWWSWWSWWSWWSWWWWWW
Gust1818
Sky Cover (%)333521385062626280808089898976767613131311
Precipitation Potential (%)222222233333311111111111
Relative Humidity (%)656569758088929394949393929293949389837670646058
Rain------------------------------------------------
Thunder------------------------------------------------

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