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

63°F

17°C

Humidity 10%
Wind Speed SSE 3 MPH
Barometer NA
Dewpoint 7°F (-14°C)
Visibility NA
Last update 30 Jan 01:10 PM PST
Extended Forecast for

4 Miles SSE Clayton CA

  • This Afternoon

    This Afternoon: Mostly sunny, with a steady temperature around 57. East northeast wind around 8 mph.

    High: 57 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 50. East wind around 7 mph.

    Low: 50 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 63. East wind 6 to 8 mph.

    High: 63 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 48. East wind around 6 mph becoming west after midnight.

    Low: 48 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 60. Southwest wind 6 to 9 mph becoming west northwest in the afternoon.

    High: 60 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a steady temperature around 57. East northeast wind around 8 mph.
Tonight
Mostly cloudy, with a low around 50. East wind around 7 mph.
Saturday
Partly sunny, with a high near 63. East wind 6 to 8 mph.
Saturday Night
Mostly cloudy, with a low around 48. East wind around 6 mph becoming west after midnight.
Sunday
Mostly sunny, with a high near 60. Southwest wind 6 to 9 mph becoming west northwest in the afternoon.
Sunday Night
Partly cloudy, with a low around 46.
Monday
Sunny, with a high near 60.
Monday Night
Mostly clear, with a low around 45.
Tuesday
Sunny, with a high near 60.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Sunny, with a high near 62.
Wednesday Night
Mostly clear, with a low around 46.
Thursday
Sunny, with a high near 62.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
12:26 pm PST Jan 30, 2026
1pm PST Jan 30, 2026-6pm PST Feb 5, 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