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 >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

32°F

0°C

Humidity 100%
Wind Speed SSW 16 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Wind Chill21°F (-6°C)
Last update 17 Feb 06:20 AM PST
Extended Forecast for

3 Miles S Clayton CA

  • Today

    Today: Rain before 10am, then showers and possibly a thunderstorm after 10am. Steady temperature around 40. Breezy, with a southwest wind 20 to 28 mph, with gusts as high as 48 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    High: 40 °F

    Showers and
    Breezy

  • Tonight

    Tonight: Rain and snow before 1am, then a chance of snow between 1am and 4am, then a chance of rain and snow after 4am. Steady temperature around 37. West wind 13 to 16 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 37 °F

    Rain/Snow
    then Chance
    Rain/Snow

  • Wednesday

    Wednesday: A chance of rain and snow before 10am, then rain likely. Mostly cloudy, with a high near 45. West southwest wind around 16 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 45 °F

    Rain/Snow
    Likely then
    Rain Likely

  • Wednesday Night

    Wednesday Night: Rain. Low around 39. South southeast wind 13 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 39 °F

    Rain

  • Thursday

    Thursday: Rain. High near 44. Breezy, with a south wind 20 to 22 mph becoming west in the afternoon. Winds could gust as high as 39 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 44 °F

    Rain and
    Breezy then
    Rain Likely

  • Thursday Night

    Thursday Night: A chance of rain before 1am, then a chance of rain and snow. Partly cloudy, with a low around 34. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 34 °F

    Chance Rain
    then Chance
    Rain/Snow

  • Friday

    Friday: A chance of rain and snow before 1pm, then a chance of rain. Mostly sunny, with a high near 47. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 47 °F

    Chance
    Rain/Snow

  • Friday Night

    Friday Night: A chance of rain. Partly cloudy, with a low around 38.

    Low: 38 °F

    Chance Rain

  • Saturday

    Saturday: A chance of rain. Partly sunny, with a high near 51.

    High: 51 °F

    Chance Rain

Detailed Forecast

Today
Rain before 10am, then showers and possibly a thunderstorm after 10am. Steady temperature around 40. Breezy, with a southwest wind 20 to 28 mph, with gusts as high as 48 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Tonight
Rain and snow before 1am, then a chance of snow between 1am and 4am, then a chance of rain and snow after 4am. Steady temperature around 37. West wind 13 to 16 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Wednesday
A chance of rain and snow before 10am, then rain likely. Mostly cloudy, with a high near 45. West southwest wind around 16 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Wednesday Night
Rain. Low around 39. South southeast wind 13 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Rain. High near 44. Breezy, with a south wind 20 to 22 mph becoming west in the afternoon. Winds could gust as high as 39 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
A chance of rain before 1am, then a chance of rain and snow. Partly cloudy, with a low around 34. Chance of precipitation is 30%. Little or no snow accumulation expected.
Friday
A chance of rain and snow before 1pm, then a chance of rain. Mostly sunny, with a high near 47. Chance of precipitation is 30%. Little or no snow accumulation expected.
Friday Night
A chance of rain. Partly cloudy, with a low around 38.
Saturday
A chance of rain. Partly sunny, with a high near 51.
Saturday Night
Rain likely, mainly after 10pm. Mostly cloudy, with a low around 45.
Sunday
Rain likely. Mostly cloudy, with a high near 56.
Sunday Night
Rain. Cloudy, with a low around 50.
Monday
Rain. Cloudy, with a high near 56.
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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:
3:53 am PST Feb 17, 2026
Forecast Valid:
6am PST Feb 17, 2026-6pm PST Feb 23, 2026
 
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