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 06:35 PM PST
Extended Forecast for

2 Miles SSW Clayton CA

  • Tonight

    Tonight: Increasing clouds, with a low around 44. East southeast wind 5 to 7 mph becoming calm  after midnight.

    Low: 44 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, then gradually becoming sunny, with a high near 58. Light and variable wind becoming north northeast around 5 mph.

    High: 58 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 43. Calm wind becoming northeast 5 to 7 mph after midnight.

    Low: 43 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 57. North northeast wind 9 to 15 mph, with gusts as high as 22 mph.

    High: 57 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 40. East northeast wind 3 to 8 mph.

    Low: 40 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 54.

    High: 54 °F

    Mostly Sunny

  • Thursday Night

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

    Low: 44 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 44. East southeast wind 5 to 7 mph becoming calm after midnight.
Tuesday
Partly sunny, then gradually becoming sunny, with a high near 58. Light and variable wind becoming north northeast around 5 mph.
Tuesday Night
Partly cloudy, with a low around 43. Calm wind becoming northeast 5 to 7 mph after midnight.
Wednesday
Mostly sunny, with a high near 57. North northeast wind 9 to 15 mph, with gusts as high as 22 mph.
Wednesday Night
Partly cloudy, with a low around 40. East northeast wind 3 to 8 mph.
Thursday
Mostly sunny, with a high near 54.
Thursday Night
Mostly clear, with a low around 44.
Friday
Sunny, with a high near 58.
Friday Night
Partly cloudy, with a low around 44.
Saturday
Mostly sunny, with a high near 56.
Saturday Night
Partly cloudy, with a low around 46.
Sunday
Partly sunny, with a high near 57.
Sunday Night
Partly cloudy, with a low around 45.
Monday
Mostly sunny, with a high near 58.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Clayton CA
 37.91°N 121.96°W (Elev. 1299 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