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Widespread Showers and Thunderstorms in Southern California and the Southern Plains into the Mississippi Valley

Isolated strong to severe thunderstorms and widespread heavy rainfall are possible across the southern Plains into Arkansas. Widespread showers with a slight chance of thunderstorms are possible across southern California. Urban flooding, rock and mudslides as well as minor debris flows near burn scars are possible. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

39°F

4°C

Humidity 100%
Wind Speed NNW 13 MPH
Barometer NA
Dewpoint 39°F (4°C)
Visibility NA
Wind Chill31°F (-1°C)
Last update 20 Nov 09:50 PM PST
Extended Forecast for

3 Miles N San Ramon CA

  • Tonight

    Tonight: Patchy fog before 5am. Otherwise, partly cloudy, with a low around 42. Calm wind.

    Low: 42 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 62. Light north northwest wind.

    High: 62 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Patchy fog after 5am. Otherwise, mostly clear, with a low around 41. Calm wind.

    Low: 41 °F

    Clear then
    Patchy Fog

  • Saturday

    Saturday: Areas of fog before 9am. Otherwise, sunny, with a high near 63. Calm wind.

    High: 63 °F

    Areas Fog
    then Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 4am. Otherwise, mostly clear, with a low around 41. Calm wind.

    Low: 41 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

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

    High: 62 °F

    Areas Fog
    then Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 43.

    Low: 43 °F

    Patchy Fog

  • Monday

    Monday: Areas of fog before 11am. Otherwise, mostly sunny, with a high near 61.

    High: 61 °F

    Areas Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog before 5am. Otherwise, partly cloudy, with a low around 42. Calm wind.
Friday
Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 62. Light north northwest wind.
Friday Night
Patchy fog after 5am. Otherwise, mostly clear, with a low around 41. Calm wind.
Saturday
Areas of fog before 9am. Otherwise, sunny, with a high near 63. Calm wind.
Saturday Night
Patchy fog after 4am. Otherwise, mostly clear, with a low around 41. Calm wind.
Sunday
Areas of fog before 10am. Otherwise, sunny, with a high near 62.
Sunday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 43.
Monday
Areas of fog before 11am. Otherwise, mostly sunny, with a high near 61.
Monday Night
Mostly clear, with a low around 42.
Tuesday
Patchy fog between 7am and 8am. Otherwise, mostly sunny, with a high near 62.
Tuesday Night
Partly cloudy, with a low around 42.
Wednesday
Mostly sunny, with a high near 62.
Wednesday Night
Partly cloudy, with a low around 43.
Thanksgiving Day
Patchy fog. Otherwise, mostly sunny, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N San Ramon CA
 37.8°N 121.96°W (Elev. 604 ft)
Last Update:
2:11 pm PST Nov 20, 2025
Forecast Valid:
10pm PST Nov 20, 2025-6pm PST Nov 27, 2025
 
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Additional Resources

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