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

43°F

6°C

Humidity 29%
Wind Speed N 17 MPH
Barometer NA
Dewpoint 14°F (-10°C)
Visibility NA
Wind Chill35°F (2°C)
Last update 09 Jan 06:10 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 33. East wind 6 to 8 mph.

    Low: 33 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 49. East northeast wind 7 to 10 mph.

    High: 49 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a steady temperature around 44. East northeast wind around 7 mph.

    Low: 44 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 50. Northeast wind around 7 mph.

    High: 50 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39. North northeast wind around 9 mph.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 51.

    High: 51 °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 54.

    High: 54 °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 33. East wind 6 to 8 mph.
Saturday
Mostly sunny, with a high near 49. East northeast wind 7 to 10 mph.
Saturday Night
Mostly cloudy, with a steady temperature around 44. East northeast wind around 7 mph.
Sunday
Mostly sunny, with a high near 50. Northeast wind around 7 mph.
Sunday Night
Mostly clear, with a low around 39. North northeast wind around 9 mph.
Monday
Sunny, with a high near 51.
Monday Night
Mostly clear, with a low around 40.
Tuesday
Sunny, with a high near 54.
Tuesday Night
Mostly clear, with a low around 42.
Wednesday
Sunny, with a high near 55.
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 56.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
Last Update:
1:09 pm PST Jan 9, 2026
Forecast Valid:
6pm PST Jan 9, 2026-6pm PST Jan 16, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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