Heavy Rain in the Southern U.S.; Winter Storm to Impact the Northern Mid-Atlantic and Interior Northeast

A storm system stretching from the Tennessee Valley to the Gulf Coast will bring a variety of hazards to the Eastern U.S. through Tuesday. On the south side of the system, heavy rain and thunderstorms will persist across the Southern U.S. Further north, a wintry precipitation mix is expected from the Central Appalachians to the interior Northeast through Tuesday. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

52°F

11°C

Humidity 48%
Wind Speed S 4 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Last update 01 Dec 07:10 PM PST
Extended Forecast for

3 Miles NNE San Ramon CA

  • Tonight

    Tonight: Increasing clouds, with a low around 40. Northeast wind 5 to 7 mph becoming calm  after midnight.

    Low: 40 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, then gradually becoming sunny, with a high near 63. Calm wind becoming west northwest around 5 mph.

    High: 63 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 39. Calm wind becoming north 5 to 7 mph after midnight.

    Low: 39 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 61. North wind 11 to 13 mph, with gusts as high as 20 mph.

    High: 61 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 36. North northeast wind 5 to 9 mph becoming calm  after midnight.

    Low: 36 °F

    Partly Cloudy

  • Thursday

    Thursday: Areas of frost before 8am.  Otherwise, mostly sunny, with a high near 58.

    High: 58 °F

    Areas Frost
    then Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 40. Northeast wind 5 to 7 mph becoming calm after midnight.
Tuesday
Partly sunny, then gradually becoming sunny, with a high near 63. Calm wind becoming west northwest around 5 mph.
Tuesday Night
Partly cloudy, with a low around 39. Calm wind becoming north 5 to 7 mph after midnight.
Wednesday
Mostly sunny, with a high near 61. North wind 11 to 13 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 36. North northeast wind 5 to 9 mph becoming calm after midnight.
Thursday
Areas of frost before 8am. Otherwise, mostly sunny, with a high near 58.
Thursday Night
Mostly clear, with a low around 40.
Friday
Sunny, with a high near 62.
Friday Night
Partly cloudy, with a low around 42.
Saturday
Patchy fog between 7am and 8am. Otherwise, mostly sunny, with a high near 62.
Saturday Night
Patchy fog. Otherwise, partly cloudy, with a low around 45.
Sunday
Areas of fog. Otherwise, partly sunny, with a high near 62.
Sunday Night
Patchy fog. Otherwise, partly cloudy, with a low around 43.
Monday
Areas of fog. Otherwise, mostly sunny, with a high near 62.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE San Ramon CA
 37.8°N 121.93°W (Elev. 640 ft)
12:26 pm PST Dec 1, 2025
7pm PST Dec 1, 2025-6pm PST Dec 8, 2025
 
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Additional Resources

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Hourly Weather Forecast

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