National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

Lat: 37.881699°NLon: 121.914173°WElev: 3904.0ft.

NA

58°F

14°C

Humidity 26%
Wind Speed NNW 10 MPH
Barometer NA
Dewpoint 24°F (-4°C)
Visibility NA
Last update 25 Nov 10:05 PM PST
Extended Forecast for

3 Miles N San Ramon CA

Dense Fog Advisory November 25, 10:17pm until November 26, 11:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory November 25, 10:17pm until November 26, 11:00am

    NOW until 11:00am Wed

    Dense Fog Advisory

  • Tonight

    Low: 40 °F

    Patchy Dense
    Fog

  • Wednesday

    Wednesday: Patchy dense fog before 8am. Otherwise, sunny, with a high near 63. Calm wind becoming north northeast around 5 mph.

    High: 63 °F

    Patchy Dense
    Fog then
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 42. Calm wind.

    Low: 42 °F

    Partly Cloudy

  • Thanksgiving Day

    Thanksgiving Day: Mostly sunny, with a high near 65. Calm wind.

    High: 65 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Patchy fog after midnight. Otherwise, partly cloudy, with a low around 43. Calm wind.

    Low: 43 °F

    Partly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: Areas of fog before 10am. Otherwise, mostly sunny, with a high near 62.

    High: 62 °F

    Areas Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Patchy fog after midnight. Otherwise, partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: Areas of fog before 9am. Otherwise, mostly sunny, with a high near 61.

    High: 61 °F

    Areas Fog
    then Mostly
    Sunny

Detailed Forecast

Tonight
Patchy dense fog between 4am and 5am. Otherwise, partly cloudy, with a low around 40. Calm wind.
Wednesday
Patchy dense fog before 8am. Otherwise, sunny, with a high near 63. Calm wind becoming north northeast around 5 mph.
Wednesday Night
Partly cloudy, with a low around 42. Calm wind.
Thanksgiving Day
Mostly sunny, with a high near 65. Calm wind.
Thursday Night
Patchy fog after midnight. Otherwise, partly cloudy, with a low around 43. Calm wind.
Friday
Areas of fog before 10am. Otherwise, mostly sunny, with a high near 62.
Friday Night
Patchy fog after midnight. Otherwise, partly cloudy, with a low around 44.
Saturday
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 61.
Saturday Night
Partly cloudy, with a low around 42.
Sunday
Mostly sunny, with a high near 60.
Sunday Night
Partly cloudy, with a low around 40.
Monday
Sunny, with a high near 61.
Monday Night
Mostly clear, with a low around 41.
Tuesday
Patchy fog. Otherwise, mostly sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N San Ramon CA
 37.8°N 121.96°W (Elev. 604 ft)
Last Update:
10:12 pm PST Nov 25, 2025
Forecast Valid:
10pm PST Nov 25, 2025-6pm PST Dec 2, 2025
 
Forecast Discussion
 
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Additional Resources

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