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

53°F

12°C

Humidity 47%
Wind Speed SSW 3 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Last update 01 Dec 05:50 PM PST
Extended Forecast for

4 Miles SSE Clayton CA

  • Tonight

    Tonight: Increasing clouds, with a low around 43. East southeast wind around 5 mph becoming calm  in the evening.

    Low: 43 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Sunny, with a high near 56. Calm wind becoming west northwest around 5 mph in the afternoon.

    High: 56 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 42. West southwest wind 5 to 7 mph becoming north after midnight.

    Low: 42 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 54. North wind 10 to 14 mph, with gusts as high as 22 mph.

    High: 54 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 39. North northeast wind around 5 mph becoming light and variable  in the evening.

    Low: 39 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 51.

    High: 51 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 43. East southeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 56. Calm wind becoming west northwest around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 42. West southwest wind 5 to 7 mph becoming north after midnight.
Wednesday
Mostly sunny, with a high near 54. North wind 10 to 14 mph, with gusts as high as 22 mph.
Wednesday Night
Mostly clear, with a low around 39. North northeast wind around 5 mph becoming light and variable in the evening.
Thursday
Mostly sunny, with a high near 51.
Thursday Night
Mostly clear, with a low around 43.
Friday
Sunny, with a high near 54.
Friday Night
Mostly clear, with a low around 44.
Saturday
Mostly sunny, with a high near 54.
Saturday Night
Partly cloudy, with a low around 46.
Sunday
Mostly sunny, with a high near 54.
Sunday Night
Partly cloudy, with a low around 44.
Monday
Mostly sunny, with a high near 55.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.9°N 121.9°W (Elev. 1814 ft)
12:26 pm PST Dec 1, 2025
6pm PST Dec 1, 2025-6pm PST Dec 8, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database