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

A Couple of Fast Moving Storms Affecting Areas Along and East of the Rockies

A couple of storm systems will impact travel conditions through the first half of this weekend. Heavy snow from the mountains of the West will move into the upper Midwest and upper Great Lakes through tonight. Record warmth and Gulf moisture along and east of the Mississippi River will fuel severe thunderstorms, heavy rainfall, fog for the Tennessee Valley and deep South on Friday into Saturday. 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

32°F

0°C

Humidity 87%
Wind Speed NNW 12 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Wind Chill23°F (-5°C)
Last update 08 Jan 11:05 AM PST
Extended Forecast for

4 Miles SSE Clayton CA

Cold Weather Advisory January 9, 01:00am until January 9, 09:00am
Click here for hazard details and duration
Cold Weather Advisory

  • Today

    Today: Sunny, with a steady temperature around 40. North wind around 14 mph, with gusts as high as 25 mph.

    High: 40 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a steady temperature around 38. North wind around 10 mph, with gusts as high as 21 mph.

    Low: 38 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 46. Northeast wind 8 to 10 mph, with gusts as high as 18 mph.

    High: 46 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 35. East northeast wind around 7 mph.

    Low: 35 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 47. Northeast wind around 8 mph.

    High: 47 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 49.

    High: 49 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

Detailed Forecast

Today
Sunny, with a steady temperature around 40. North wind around 14 mph, with gusts as high as 25 mph.
Tonight
Mostly clear, with a steady temperature around 38. North wind around 10 mph, with gusts as high as 21 mph.
Friday
Sunny, with a high near 46. Northeast wind 8 to 10 mph, with gusts as high as 18 mph.
Friday Night
Mostly clear, with a low around 35. East northeast wind around 7 mph.
Saturday
Sunny, with a high near 47. Northeast wind around 8 mph.
Saturday Night
Partly cloudy, with a low around 38.
Sunday
Partly sunny, with a high near 49.
Sunday Night
Mostly clear, with a low around 38.
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.
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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:
8:41 am PST Jan 8, 2026
Forecast Valid:
11am PST Jan 8, 2026-6pm PST Jan 14, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation