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

Fire Weather in the Central and Southern Plains; Pacific Storms Impacting the West

Gusty to high winds and low relative humidity will bring elevated to critical fire weather to the central and southern Plains into Wednesday. Two Pacific storms will impact the western U.S. into Wednesday with gusty winds, low elevation rain, and heavy mountain snow. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

40°F

4°C

Humidity 100%
Wind Speed S 20 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Wind Chill30°F (-1°C)
Last update 16 Feb 12:25 AM PST
Extended Forecast for

Clayton CA

  • Overnight

    Overnight: Rain. Steady temperature around 49. Southeast wind 8 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 49 °F

    Rain

  • Washington's Birthday

    Washington's Birthday: Rain. High near 50. East wind 10 to 14 mph becoming west in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    High: 50 °F

    Rain

  • Monday Night

    Monday Night: Rain, mainly after 4am. Low around 42. West southwest wind around 17 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 42 °F

    Rain

  • Tuesday

    Tuesday: Rain before 10am, then showers and possibly a thunderstorm after 10am. High near 47. Windy, with a southwest wind 23 to 30 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 47 °F

    Showers and
    Windy

  • Tuesday Night

    Tuesday Night: Rain, mainly before 10pm. Low around 39. West wind 14 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 39 °F

    Rain then
    Chance Rain

  • Wednesday

    Wednesday: Rain likely, mainly after 10am. Mostly cloudy, with a high near 48. Chance of precipitation is 70%. 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. Chance of precipitation is 80%.

    Low: 40 °F

    Rain

  • Thursday

    Thursday: Rain likely, mainly before 4pm. Mostly cloudy, with a high near 50.

    High: 50 °F

    Rain Likely

  • Thursday Night

    Thursday Night: A chance of rain, mainly before 10pm. Mostly cloudy, with a low around 39.

    Low: 39 °F

    Chance Rain

Detailed Forecast

Overnight
Rain. Steady temperature around 49. Southeast wind 8 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Washington's Birthday
Rain. High near 50. East wind 10 to 14 mph becoming west in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Monday Night
Rain, mainly after 4am. Low around 42. West southwest wind around 17 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
Rain before 10am, then showers and possibly a thunderstorm after 10am. High near 47. Windy, with a southwest wind 23 to 30 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday Night
Rain, mainly before 10pm. Low around 39. West wind 14 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. 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. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Rain. Low around 40. Chance of precipitation is 80%.
Thursday
Rain likely, mainly before 4pm. Mostly cloudy, with a high near 50.
Thursday Night
A chance of rain, mainly before 10pm. Mostly cloudy, with a low around 39.
Friday
A chance of rain. Partly sunny, with a high near 51.
Friday Night
A chance of rain. Mostly cloudy, with a low around 40.
Saturday
A chance of rain. Partly sunny, with a high near 54.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 44.
Sunday
A chance of rain. Partly sunny, with a high near 57.
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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:
12:26 am PST Feb 16, 2026
Forecast Valid:
12am PST Feb 16, 2026-6pm PST Feb 22, 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