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

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 >

Hazardous Weather Conditions

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

51°F

11°C

Humidity 19%
Wind Speed NNE 7 MPH
Barometer NA
Dewpoint 10°F (-12°C)
Visibility NA
Last update 09 Jan 08:35 PM PST
Extended Forecast for

4 Miles SSE Clayton CA

Cold Weather Advisory January 10, 01:00am until January 10, 09:00am
Click here for hazard details and duration
Cold Weather Advisory

  • Tonight

    Tonight: Mostly clear, with a low around 35. East southeast wind 5 to 7 mph.

    Low: 35 °F

    Mostly Clear

  • Saturday

    Saturday: Partly sunny, with a high near 48. East wind 7 to 9 mph.

    High: 48 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a steady temperature around 43. East southeast wind around 5 mph.

    Low: 43 °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 40. Light north wind.

    Low: 40 °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 40.

    Low: 40 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 55.

    High: 55 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 35. East southeast wind 5 to 7 mph.
Saturday
Partly sunny, with a high near 48. East wind 7 to 9 mph.
Saturday Night
Mostly cloudy, with a steady temperature around 43. East southeast wind around 5 mph.
Sunday
Mostly sunny, with a high near 51. Northeast wind around 6 mph.
Sunday Night
Mostly clear, with a low around 40. Light north wind.
Monday
Sunny, with a high near 52.
Monday Night
Mostly clear, with a low around 40.
Tuesday
Sunny, with a high near 55.
Tuesday Night
Mostly clear, with a low around 42.
Wednesday
Sunny, with a high near 56.
Wednesday Night
Mostly clear, with a low around 43.
Thursday
Sunny, with a high near 57.
Thursday Night
Mostly clear, with a low around 43.
Friday
Sunny, with a high near 57.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.9°N 121.9°W (Elev. 1814 ft)
Last Update:
1:09 pm PST Jan 9, 2026
Forecast Valid:
8pm PST Jan 9, 2026-6pm PST Jan 16, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation