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

Atmospheric River Continues Areas of Heavy Rain and Snow for California This Weekend

An atmospheric river will continue to bring gusty winds, moderate to heavy rainfall, and potential flooding to southern California and the southern Great Basin through Sunday. Periods of heavy snow will continue as well above 7,000 feet over the Sierra Nevada mountains associated with this atmospheric river. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

45°F

7°C

Humidity 99%
Wind Speed NNE 4 MPH
Barometer NA
Dewpoint 45°F (7°C)
Visibility NA
Wind Chill43°F (6°C)
Last update 14 Nov 11:35 PM PST
Extended Forecast for

Clayton CA

  • Tonight

    Tonight: Mostly cloudy, with a low around 52. Light east northeast wind.

    Low: 52 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of showers after 10am. Mostly cloudy, with a high near 60. East northeast wind 5 to 7 mph becoming southwest in the afternoon. New precipitation amounts of less than a tenth of an inch possible.

    High: 60 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely. Cloudy, with a low around 53. South southwest wind 9 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 53 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers likely. Mostly cloudy, with a high near 58. South southwest wind 11 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 58 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers. Low around 52. South southeast wind 9 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 52 °F

    Showers

  • Monday

    Monday: Showers likely, mainly before 4pm. Mostly cloudy, with a high near 55. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 55 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 20 percent chance of showers before 10pm. Partly cloudy, with a low around 48.

    Low: 48 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 58.

    High: 58 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 52. Light east northeast wind.
Saturday
A 30 percent chance of showers after 10am. Mostly cloudy, with a high near 60. East northeast wind 5 to 7 mph becoming southwest in the afternoon. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Showers likely. Cloudy, with a low around 53. South southwest wind 9 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
Showers likely. Mostly cloudy, with a high near 58. South southwest wind 11 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Showers. Low around 52. South southeast wind 9 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Monday
Showers likely, mainly before 4pm. Mostly cloudy, with a high near 55. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
A 20 percent chance of showers before 10pm. Partly cloudy, with a low around 48.
Tuesday
Mostly sunny, with a high near 58.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Mostly sunny, with a high near 57.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 49.
Thursday
A chance of showers. Partly sunny, with a high near 56.
Thursday Night
A chance of showers. Partly cloudy, with a low around 50.
Friday
Mostly sunny, with a high near 59.
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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:
8:05 pm PST Nov 14, 2025
Forecast Valid:
11pm PST Nov 14, 2025-6pm PST Nov 21, 2025
 
Forecast Discussion
 
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Additional Resources

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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