Significant Winter Storm to Bring Heavy Snow and Ice Impacts; Dangerously Cold Temperatures Expands Across the East; Severe Storm Threat in the Gulf States Sunday

A significant winter storm is underway, bringing widespread heavy snow, sleet, and freezing rain from the Southern Rockies to New England through Monday. Extremely cold air will follow, prolonging dangerous travel and infrastructure impacts into next week. Severe thunderstorms may produce damaging gusts and tornadoes across the eastern Gulf Coast states Sunday morning and afternoon. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

47°F

8°C

Humidity 22%
Wind Speed SW 10 MPH
Barometer NA
Dewpoint 11°F (-12°C)
Visibility NA
Wind Chill42°F (6°C)
Last update 25 Jan 01:05 PM PST
Extended Forecast for

3 Miles SSE Clayton CA

  • This Afternoon

    This Afternoon: Cloudy, with a steady temperature around 49. East wind around 7 mph.

    High: 49 °F

    Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 41. Southeast wind around 6 mph.

    Low: 41 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 55. South southeast wind around 6 mph becoming calm.

    High: 55 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 42. Light and variable wind becoming southeast around 5 mph after midnight.

    Low: 42 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 56. North northeast wind around 6 mph.

    High: 56 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain after 10pm.  Mostly cloudy, with a low around 45.

    Low: 45 °F

    Slight Chance
    Rain

  • Wednesday

    Wednesday: A 20 percent chance of rain before 10am.  Mostly sunny, with a high near 56.

    High: 56 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 58.

    High: 58 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Cloudy, with a steady temperature around 49. East wind around 7 mph.
Tonight
Mostly cloudy, with a low around 41. Southeast wind around 6 mph.
Monday
Mostly sunny, with a high near 55. South southeast wind around 6 mph becoming calm.
Monday Night
Partly cloudy, with a low around 42. Light and variable wind becoming southeast around 5 mph after midnight.
Tuesday
Mostly sunny, with a high near 56. North northeast wind around 6 mph.
Tuesday Night
A 20 percent chance of rain after 10pm. Mostly cloudy, with a low around 45.
Wednesday
A 20 percent chance of rain before 10am. Mostly sunny, with a high near 56.
Wednesday Night
Mostly clear, with a low around 44.
Thursday
Mostly sunny, with a high near 58.
Thursday Night
Partly cloudy, with a low around 44.
Friday
Partly sunny, with a high near 58.
Friday Night
Mostly cloudy, with a low around 45.
Saturday
Partly sunny, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Clayton CA
 37.9°N 121.9°W (Elev. 1814 ft)
12:26 pm PST Jan 25, 2026
1pm PST Jan 25, 2026-6pm PST Jan 31, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database