National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Lake Effect Snow through Saturday: A Series of Storms Impact the West

Lake effect snow showers will continue through Saturday downwind of Lakes Erie, Ontario and the eastern portion of Lake Superior. A series of storm systems will continue to impact California and the Pacific Northwest through the weekend and into next week, bringing widespread rainfall, mountain snowfall, and gusty winds. Coastal flooding is expected in northern California. Read More >

Hazardous Weather Conditions

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

43°F

6°C

Humidity 100%
Wind Speed S 16 MPH
Barometer NA
Dewpoint 43°F (6°C)
Visibility NA
Wind Chill35°F (2°C)
Last update 03 Jan 06:35 AM PST
Extended Forecast for

3 Miles S Clayton CA

Wind Advisory January 3, 06:58am until January 3, 01:00pm
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory January 3, 06:58am until January 3, 01:00pm

    NOW until 1:00pm Sat

    Wind Advisory

  • Today

    High: 52 °F

    Showers and
    Breezy

  • Tonight

    Tonight: Showers likely before 10pm, then showers and possibly a thunderstorm between 10pm and 1am, then showers after 1am. Low around 47. South wind 18 to 21 mph, with gusts as high as 37 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 47 °F

    Showers

  • Sunday

    Sunday: Showers. High near 49. South wind 16 to 21 mph decreasing to 10 to 15 mph in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 49 °F

    Showers

  • Sunday Night

    Sunday Night: Showers likely. Mostly cloudy, with a low around 46. South wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 46 °F

    Showers
    Likely

  • Monday

    Monday: Showers. High near 50. South southeast wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 50 °F

    Showers

  • Monday Night

    Monday Night: Showers likely, mainly before 10pm. Mostly cloudy, with a low around 45. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 45 °F

    Showers
    Likely then
    Chance
    Showers

  • Tuesday

    Tuesday: A 20 percent chance of showers before 10am. Partly sunny, with a high near 50.

    High: 50 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers after 4am. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Today
Showers and possibly a thunderstorm. High near 52. Breezy, with a south wind 20 to 24 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers likely before 10pm, then showers and possibly a thunderstorm between 10pm and 1am, then showers after 1am. Low around 47. South wind 18 to 21 mph, with gusts as high as 37 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
Showers. High near 49. South wind 16 to 21 mph decreasing to 10 to 15 mph in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday Night
Showers likely. Mostly cloudy, with a low around 46. South wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Showers. High near 50. South southeast wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
Showers likely, mainly before 10pm. Mostly cloudy, with a low around 45. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
A 20 percent chance of showers before 10am. Partly sunny, with a high near 50.
Tuesday Night
A chance of showers after 4am. Mostly cloudy, with a low around 43.
Wednesday
A chance of showers, mainly before 10am. Mostly sunny, with a high near 50.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 38.
Thursday
Sunny, with a high near 47.
Thursday Night
Mostly clear, with a low around 36.
Friday
Sunny, with a high near 47.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Clayton CA
 37.9°N 121.92°W (Elev. 1900 ft)
Last Update:
1:23 am PST Jan 3, 2026
Forecast Valid:
6am PST Jan 3, 2026-6pm PST Jan 9, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation