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

Extremely Critical Fire Weather in the Central Plains; Active Pattern in the West

Gusty to high winds and low relative humidity will bring critical to extremely critical fire weather conditions to the central and southern Plains today into Wednesday. Use caution with any potential ignition sources. Two Pacific storms will impact the western U.S. into Wednesday with gusty winds, low elevation rain and heavy mountain snow. 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

33°F

1°C

Humidity 100%
Wind Speed SW 18 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Wind Chill22°F (-6°C)
Last update 17 Feb 10:50 AM PST
Extended Forecast for

Clayton CA

Flood Advisory until February 17, 01:00pm
Click here for hazard details and duration
Flood Advisory
  •  
    Flood Advisory until February 17, 01:00pm

    NOW until 1:00pm Tue

    Flood Advisory

  • Today

    High: 47 °F

    Showers and
    Breezy

  • Tonight

    Tonight: Showers likely before midnight, then a chance of rain after 4am. Mostly cloudy, with a low around 36. West southwest wind 10 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 36 °F

    Showers
    Likely then
    Chance Rain

  • Wednesday

    Wednesday: Rain likely, mainly after 10am. Mostly cloudy, with a high near 48. West southwest wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 48 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: Rain. Low around 40. South southeast wind 11 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 40 °F

    Rain

  • Thursday

    Thursday: Rain. High near 46. South wind around 18 mph becoming west in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 46 °F

    Rain then
    Rain Likely

  • Thursday Night

    Thursday Night: A 30 percent chance of rain. Partly cloudy, with a low around 35.

    Low: 35 °F

    Chance Rain

  • Friday

    Friday: A 30 percent chance of rain. Mostly sunny, with a high near 49.

    High: 49 °F

    Chance Rain

  • Friday Night

    Friday Night: A chance of rain. Partly cloudy, with a low around 39.

    Low: 39 °F

    Chance Rain

Detailed Forecast

Today
Showers and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms between 3pm and 4pm, then showers and possibly a thunderstorm after 4pm. High near 47. Breezy, with a southwest wind 21 to 28 mph, with gusts as high as 44 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 midnight, then a chance of rain after 4am. Mostly cloudy, with a low around 36. West southwest wind 10 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Rain likely, mainly after 10am. Mostly cloudy, with a high near 48. West southwest wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Rain. Low around 40. South southeast wind 11 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Rain. High near 46. South wind around 18 mph becoming west in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
A 30 percent chance of rain. Partly cloudy, with a low around 35.
Friday
A 30 percent chance of rain. Mostly sunny, with a high near 49.
Friday Night
A chance of rain. Partly cloudy, with a low around 39.
Saturday
A chance of rain. Partly sunny, with a high near 53.
Saturday Night
Rain likely, mainly after 10pm. Mostly cloudy, with a low around 46.
Sunday
Rain. Mostly cloudy, with a high near 58.
Sunday Night
Rain. Cloudy, with a low around 51.
Monday
Rain. Cloudy, with a high near 58.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Clayton CA
 37.91°N 121.96°W (Elev. 1299 ft)
Last Update:
9:15 am PST Feb 17, 2026
Forecast Valid:
11am PST Feb 17, 2026-6pm PST Feb 23, 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