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

Snow Squalls in the Northeast U.S. on Thursday; Heavy Rain Along the Gulf Coast

An arctic cold front will move through the Great Lakes and Northeast on Thursday, bringing moderate to heavy snow, strong winds, and possible whiteout conditions through Thursday afternoon. A storm system interacting with Gulf moisture will bring moderate to heavy rainfall to the western and central Gulf Coast on Thursday. Isolated instances of flash flooding will be possible. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

41°F

5°C

Humidity 51%
Wind Speed N 20 MPH
Barometer NA
Dewpoint 24°F (-4°C)
Visibility NA
Wind Chill32°F (0°C)
Last update 04 Dec 02:50 AM PST
Extended Forecast for

3 Miles NNE San Ramon CA

  • Overnight

    Overnight: Partly cloudy, with a low around 37. Calm wind.

    Low: 37 °F

    Partly Cloudy

  • Thursday

    Thursday: Patchy frost between 7am and 8am. Otherwise, sunny, with a high near 57. North northeast wind 5 to 7 mph.

    High: 57 °F

    Patchy Frost
    then Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 40. Light and variable wind.

    Low: 40 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 63. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 63 °F

    Sunny

  • Friday Night

    Friday Night: Patchy fog after 2am. Otherwise, mostly clear, with a low around 42. Calm wind.

    Low: 42 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

  • Saturday Night

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

    Low: 43 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

    Sunday: Areas of fog before 9am. Otherwise, mostly sunny, with a high near 64.

    High: 64 °F

    Areas Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Patchy fog before 2am, then patchy fog after 5am. Otherwise, partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy
    then Patchy
    Fog

Detailed Forecast

Overnight
Partly cloudy, with a low around 37. Calm wind.
Thursday
Patchy frost between 7am and 8am. Otherwise, sunny, with a high near 57. North northeast wind 5 to 7 mph.
Thursday Night
Mostly clear, with a low around 40. Light and variable wind.
Friday
Sunny, with a high near 63. Calm wind becoming northwest around 5 mph in the afternoon.
Friday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 42. Calm wind.
Saturday
Mostly sunny, with a high near 62.
Saturday Night
Patchy fog after midnight. Otherwise, partly cloudy, with a low around 43.
Sunday
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 64.
Sunday Night
Patchy fog before 2am, then patchy fog after 5am. Otherwise, partly cloudy, with a low around 43.
Monday
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 64.
Monday Night
Patchy fog. Otherwise, partly cloudy, with a low around 43.
Tuesday
Areas of fog. Otherwise, mostly sunny, with a high near 63.
Tuesday Night
Patchy fog. Otherwise, partly cloudy, with a low around 44.
Wednesday
Areas of fog. Otherwise, mostly sunny, with a high near 64.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE San Ramon CA
 37.8°N 121.93°W (Elev. 640 ft)
Last Update:
2:09 am PST Dec 4, 2025
Forecast Valid:
3am PST Dec 4, 2025-6pm PST Dec 10, 2025
 
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Additional Resources

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