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

Atmospheric River to Impact the Northwest; Windy Conditions in the Northeast

A strong atmospheric river moving into northern California later today will bring a threat for moderate to heavy rainfall and flooding, gusty to high winds, and mountain snows for parts of the Northwest U.S. through Wednesday. Gusty winds and isolated showers are expected today in the Northeast U.S. behind a cold front. Wind Advisories have been issued. 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

53°F

12°C

Humidity 84%
Wind Speed SSE 7 MPH
Barometer NA
Dewpoint 48°F (9°C)
Visibility NA
Last update 04 Nov 11:50 AM PST
Extended Forecast for

Clayton CA

Wind Advisory November 4, 10:00pm until November 5, 04:00pm
Click here for hazard details and duration
Wind Advisory

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 68. South southwest wind 6 to 8 mph.

    High: 68 °F

    Partly Sunny

  • Tonight

    Tonight: A 40 percent chance of showers after 10pm. Mostly cloudy, with a low around 57. Breezy, with a south wind 9 to 14 mph increasing to 18 to 23 mph after midnight. Winds could gust as high as 38 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 57 °F

    Chance
    Showers and
    Breezy

  • Wednesday

    Wednesday: Showers before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 60. Breezy, with a south wind 21 to 26 mph decreasing to 15 to 20 mph in the afternoon. Winds could gust as high as 46 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 60 °F

    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers, mainly before 10pm. Mostly cloudy, with a low around 55. South wind around 6 mph becoming calm after midnight. New precipitation amounts of less than a tenth of an inch possible.

    Low: 55 °F

    Chance
    Showers then
    Slight Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 64. Calm wind becoming west northwest around 6 mph in the morning.

    High: 64 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 68. South southwest wind 6 to 8 mph.
Tonight
A 40 percent chance of showers after 10pm. Mostly cloudy, with a low around 57. Breezy, with a south wind 9 to 14 mph increasing to 18 to 23 mph after midnight. Winds could gust as high as 38 mph. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Showers before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 60. Breezy, with a south wind 21 to 26 mph decreasing to 15 to 20 mph in the afternoon. Winds could gust as high as 46 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
A 50 percent chance of showers, mainly before 10pm. Mostly cloudy, with a low around 55. South wind around 6 mph becoming calm after midnight. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Mostly sunny, with a high near 64. Calm wind becoming west northwest around 6 mph in the morning.
Thursday Night
Partly cloudy, with a low around 54.
Friday
Mostly sunny, with a high near 65.
Friday Night
Partly cloudy, with a low around 54.
Saturday
Mostly sunny, with a high near 67.
Saturday Night
Partly cloudy, with a low around 53.
Sunday
A slight chance of showers. Partly sunny, with a high near 67.
Sunday Night
A slight chance of showers. Mostly cloudy, with a low around 56.
Monday
A slight chance of showers. Partly sunny, with a high near 67.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Clayton CA
 37.91°N 121.96°W (Elev. 1299 ft)
Last Update:
2:10 am PST Nov 4, 2025
Forecast Valid:
12pm PST Nov 4, 2025-6pm PST Nov 10, 2025
 
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