Another Arctic Blast in the East; Eastern U.S. Winter Storm

A powerful Arctic blast will bring dangerously cold, record low temperatures to the upper Ohio Valley, Mid-Atlantic, Gulf Coast and Southeast U.S. this weekend. A rapidly deepening storm will produce widespread heavy snow and wind from the southern Appalachians across the Carolinas and southern Virginia into Sunday. Storm-force winds and coastal flooding will be possible along the East Coast. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

57°F

14°C

Humidity 25%
Wind Speed SSW 5 MPH
Barometer NA
Dewpoint 21°F (-6°C)
Visibility NA
Last update 01 Feb 01:35 AM PST
Extended Forecast for

4 Miles S Clayton CA

  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 51. West southwest wind around 6 mph.

    Low: 51 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 60. Northwest wind 5 to 10 mph.

    High: 60 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 47. North northwest wind 8 to 11 mph, with gusts as high as 18 mph.

    Low: 47 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 61. North wind 11 to 13 mph, with gusts as high as 22 mph.

    High: 61 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 45. West southwest wind around 6 mph becoming east after midnight.

    Low: 45 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 46.

    Low: 46 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 51. West southwest wind around 6 mph.
Sunday
Partly sunny, with a high near 60. Northwest wind 5 to 10 mph.
Sunday Night
Partly cloudy, with a low around 47. North northwest wind 8 to 11 mph, with gusts as high as 18 mph.
Monday
Sunny, with a high near 61. North wind 11 to 13 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 45. West southwest wind around 6 mph becoming east after midnight.
Tuesday
Sunny, with a high near 61.
Tuesday Night
Clear, with a low around 46.
Wednesday
Sunny, with a high near 62.
Wednesday Night
Mostly clear, with a low around 46.
Thursday
Sunny, with a high near 62.
Thursday Night
Partly cloudy, with a low around 49.
Friday
Mostly sunny, with a high near 63.
Friday Night
Partly cloudy, with a low around 48.
Saturday
Mostly sunny, with a high near 62.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
12:26 am PST Feb 1, 2026
2am PST Feb 1, 2026-6pm PST Feb 7, 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