Storm Systems to Impact the Central and Eastern U.S. Through the Weekend

Two storm systems will track through the central and eastern U.S. today through this weekend with areas of gusty winds, rain and heavy snow. Severe thunderstorms and heavy to excessive rainfall is forecast today from the Lower Mississippi River Valley to the Tennessee Valley. Damaging winds, a few tornadoes, and areas of flooding are possible. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

34°F

1°C

Humidity 51%
Wind Speed N 24 MPH
Barometer NA
Dewpoint 18°F (-8°C)
Visibility NA
Wind Chill22°F (-6°C)
Last update 09 Jan 05:50 AM PST
Extended Forecast for

3 Miles S Clayton CA

Cold Weather Advisory January 9, 06:11am until January 9, 09:00am
Click here for hazard details and duration
...
  •  
    Cold Weather Advisory January 9, 06:11am until January 9, 09:00am

    NOW until 9:00am Fri

    Cold Weather Advisory

  • Today

    High: 47 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 35. East wind around 6 mph.

    Low: 35 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 48. Northeast wind around 9 mph.

    High: 48 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 38. Northeast wind around 6 mph.

    Low: 38 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 51. Northeast wind around 6 mph.

    High: 51 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

Detailed Forecast

Today
Sunny, with a high near 47. East northeast wind 7 to 9 mph, with gusts as high as 18 mph.
Tonight
Mostly clear, with a low around 35. East wind around 6 mph.
Saturday
Mostly sunny, with a high near 48. Northeast wind around 9 mph.
Saturday Night
Mostly cloudy, with a low around 38. Northeast wind around 6 mph.
Sunday
Mostly sunny, with a high near 51. Northeast wind around 6 mph.
Sunday Night
Mostly clear, with a low around 39.
Monday
Sunny, with a high near 52.
Monday Night
Mostly clear, with a low around 41.
Tuesday
Sunny, with a high near 55.
Tuesday Night
Mostly clear, with a low around 44.
Wednesday
Sunny, with a high near 57.
Wednesday Night
Mostly clear, with a low around 44.
Thursday
Sunny, with a high near 57.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Clayton CA
 37.9°N 121.92°W (Elev. 1900 ft)
12:26 am PST Jan 9, 2026
6am PST Jan 9, 2026-6pm PST Jan 15, 2026
 
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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