Significant Winter Storm to Bring Heavy Snow and Ice Impacts; Dangerously Cold Temperatures Expands Across the East

A significant, long-duration winter storm will bring widespread heavy snow, sleet, and freezing rain from the Southern Rockies to New England through Monday. Widespread travel disruptions, prolonged power outages, and vast tree damage is likely. Frigid temperatures, gusty winds, and dangerous wind chills will expand from the north-central US to the Southern Plains, MS Valley, and Midwest. Read More >

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 42%
Wind Speed NW 4 MPH
Barometer NA
Dewpoint 29°F (-2°C)
Visibility NA
Last update 23 Jan 02:50 PM PST
Extended Forecast for

4 Miles SSE Clayton CA

  • Tonight

    Tonight: Mostly clear, with a low around 41. North wind 10 to 18 mph, with gusts as high as 31 mph.

    Low: 41 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 51. North northeast wind 15 to 20 mph, with gusts as high as 32 mph.

    High: 51 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 41. North wind 8 to 14 mph, with gusts as high as 24 mph.

    Low: 41 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, with a high near 50. East southeast wind around 8 mph.

    High: 50 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 42. East wind around 6 mph.

    Low: 42 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

  • Monday Night

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

    Low: 42 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 41. North wind 10 to 18 mph, with gusts as high as 31 mph.
Saturday
Sunny, with a high near 51. North northeast wind 15 to 20 mph, with gusts as high as 32 mph.
Saturday Night
Increasing clouds, with a low around 41. North wind 8 to 14 mph, with gusts as high as 24 mph.
Sunday
Mostly cloudy, with a high near 50. East southeast wind around 8 mph.
Sunday Night
Mostly cloudy, with a low around 42. East wind around 6 mph.
Monday
Mostly sunny, with a high near 55.
Monday Night
Mostly clear, with a low around 42.
Tuesday
Mostly sunny, with a high near 55.
Tuesday Night
Mostly cloudy, with a low around 44.
Wednesday
A slight chance of rain. Partly sunny, with a high near 54.
Wednesday Night
A slight chance of rain. Mostly cloudy, with a low around 46.
Thursday
Mostly sunny, with a high near 56.
Thursday Night
Partly cloudy, with a low around 45.
Friday
Mostly sunny, with a high near 56.
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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 23, 2026
3pm PST Jan 23, 2026-6pm PST Jan 30, 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