Heavy Great Lakes Snow through Friday; Watching Potential for Major Winter Storm Late Week into this Weekend

Heavy lake effect snow will continue in the Great Lakes into Wednesday before another storm brings a widespread general snow followed by another round of heavy lake effect snow. A wide-ranging winter storm will produce great swaths of heavy snow, sleet, and treacherous freezing rain from the southern Rockies/Plains and Mid-South starting Friday and shifting toward the East Coast through Sunday. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

60°F

16°C

Humidity 22%
Wind Speed SSE 3 MPH
Barometer NA
Dewpoint 21°F (-6°C)
Visibility NA
Last update 20 Jan 11:50 AM PST
Extended Forecast for

2 Miles SSE Clayton CA

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 59. East wind around 6 mph.

    High: 59 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 48. Calm wind.

    Low: 48 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 60. Light north northeast wind.

    High: 60 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 48. Light southwest wind.

    Low: 48 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 62. West northwest wind 3 to 6 mph.

    High: 62 °F

    Mostly Sunny

  • Thursday Night

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

    Low: 46 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 61.

    High: 61 °F

    Mostly Sunny

  • Friday Night

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

    Low: 44 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 59. East wind around 6 mph.
Tonight
Mostly cloudy, with a low around 48. Calm wind.
Wednesday
Mostly cloudy, with a high near 60. Light north northeast wind.
Wednesday Night
Mostly cloudy, with a low around 48. Light southwest wind.
Thursday
Mostly sunny, with a high near 62. West northwest wind 3 to 6 mph.
Thursday Night
Partly cloudy, with a low around 46.
Friday
Mostly sunny, with a high near 61.
Friday Night
Mostly clear, with a low around 44.
Saturday
Sunny, with a high near 60.
Saturday Night
Partly cloudy, with a low around 44.
Sunday
Partly sunny, with a high near 59.
Sunday Night
Mostly cloudy, with a low around 45.
Monday
Partly sunny, with a high near 61.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE Clayton CA
 37.92°N 121.93°W (Elev. 600 ft)
12:26 am PST Jan 20, 2026
12pm PST Jan 20, 2026-6pm PST Jan 26, 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