Lake Effect Snow in the Lower Great Lakes; Unsettled Pattern in the Pacific Northwest

Lake-effect snow will continue downwind of Lakes Erie and Ontario through Friday. Lake Effect Snow Warnings have been issued. In the Western U.S., rain and higher elevation snow will continue over the Great Basin through Friday. A front will move over the Pacific Northwest this afternoon and produce light rain and higher elevation snow over the Cascades through Saturday. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

39°F

4°C

Humidity 92%
Wind Speed NE 3 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Last update 12 Feb 05:20 AM PST
Extended Forecast for

4 Miles SSE Clayton CA

  • Today

    Today: Partly sunny, then gradually becoming sunny, with a high near 55. North northeast wind around 7 mph.

    High: 55 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 44. West wind around 7 mph.

    Low: 44 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 59. West northwest wind around 6 mph.

    High: 59 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 46. South southwest wind around 8 mph.

    Low: 46 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 57. South wind around 7 mph.

    High: 57 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Rain likely, mainly after 4am.  Mostly cloudy, with a low around 48. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 48 °F

    Rain Likely

  • Sunday

    Sunday: Rain.  High near 56. Chance of precipitation is 80%.

    High: 56 °F

    Rain

  • Sunday Night

    Sunday Night: Rain.  Cloudy, with a low around 48.

    Low: 48 °F

    Rain

  • Washington's Birthday

    Washington's Birthday: Rain.  Cloudy, with a high near 52.

    High: 52 °F

    Rain

Detailed Forecast

Today
Partly sunny, then gradually becoming sunny, with a high near 55. North northeast wind around 7 mph.
Tonight
Mostly clear, with a low around 44. West wind around 7 mph.
Friday
Sunny, with a high near 59. West northwest wind around 6 mph.
Friday Night
Partly cloudy, with a low around 46. South southwest wind around 8 mph.
Saturday
Mostly cloudy, with a high near 57. South wind around 7 mph.
Saturday Night
Rain likely, mainly after 4am. Mostly cloudy, with a low around 48. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Rain. High near 56. Chance of precipitation is 80%.
Sunday Night
Rain. Cloudy, with a low around 48.
Washington's Birthday
Rain. Cloudy, with a high near 52.
Monday Night
Rain. Mostly cloudy, with a low around 45.
Tuesday
Rain. Mostly cloudy, with a high near 50.
Tuesday Night
Rain likely. Mostly cloudy, with a low around 43.
Wednesday
Rain likely. Mostly cloudy, with a high near 50.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.9°N 121.9°W (Elev. 1814 ft)
11:37 pm PST Feb 11, 2026
5am PST Feb 12, 2026-6pm PST Feb 18, 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