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 12 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Wind Chill23°F (-5°C)
Last update 17 Feb 05:50 AM PST
Extended Forecast for

4 Miles SSE Clayton CA

  • Today

    Today: Rain and snow showers. Some thunder is also possible. Temperature falling to around 36 by 11am. Windy, with a southwest wind 21 to 31 mph, with gusts as high as 49 mph. Chance of precipitation is 100%. Total daytime snow accumulation of less than a half inch possible.

    High: 41 °F⇓

    Rain/Snow and
    Windy

  • Tonight

    Tonight: Snow, mainly before 10pm. Steady temperature around 36. West wind 14 to 18 mph, with gusts as high as 36 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 36 °F

    Snow then
    Chance Snow

  • Wednesday

    Wednesday: Snow likely before 4pm, then rain and snow likely. Mostly cloudy, with a steady temperature around 37. West southwest wind around 17 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 37 °F

    Snow Likely
    then
    Rain/Snow
    Likely

  • Wednesday Night

    Wednesday Night: Snow, possibly mixed with rain. Low around 39. South southeast wind 13 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 39 °F

    Rain/Snow

  • Thursday

    Thursday: Rain and snow. High near 45. Breezy, with a south wind 22 to 24 mph becoming west in the afternoon. Winds could gust as high as 43 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 45 °F

    Breezy.
    Rain/Snow
    then
    Rain/Snow
    Likely

  • Thursday Night

    Thursday Night: A chance of rain and snow before 1am, then a chance of snow. Partly cloudy, with a low around 35. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 35 °F

    Chance
    Rain/Snow

  • Friday

    Friday: A chance of rain before 10am, then a chance of snow between 10am and 1pm, then a chance of rain and snow after 1pm. Mostly sunny, with a high near 46. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 46 °F

    Chance
    Rain/Snow

  • Friday Night

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

    Low: 39 °F

    Chance
    Rain/Snow

  • Saturday

    Saturday: A chance of rain and snow before 1pm, then a chance of rain. Partly sunny, with a high near 50.

    High: 50 °F

    Chance
    Rain/Snow

Detailed Forecast

Today
Rain and snow showers. Some thunder is also possible. Temperature falling to around 36 by 11am. Windy, with a southwest wind 21 to 31 mph, with gusts as high as 49 mph. Chance of precipitation is 100%. Total daytime snow accumulation of less than a half inch possible.
Tonight
Snow, mainly before 10pm. Steady temperature around 36. West wind 14 to 18 mph, with gusts as high as 36 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Wednesday
Snow likely before 4pm, then rain and snow likely. Mostly cloudy, with a steady temperature around 37. West southwest wind around 17 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Wednesday Night
Snow, possibly mixed with rain. Low around 39. South southeast wind 13 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Thursday
Rain and snow. High near 45. Breezy, with a south wind 22 to 24 mph becoming west in the afternoon. Winds could gust as high as 43 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Thursday Night
A chance of rain and snow before 1am, then a chance of snow. Partly cloudy, with a low around 35. Chance of precipitation is 30%. Little or no snow accumulation expected.
Friday
A chance of rain before 10am, then a chance of snow between 10am and 1pm, then a chance of rain and snow after 1pm. Mostly sunny, with a high near 46. Chance of precipitation is 30%. Little or no snow accumulation expected.
Friday Night
A chance of rain and snow. Partly cloudy, with a low around 39.
Saturday
A chance of rain and snow before 1pm, then a chance of rain. Partly sunny, with a high near 50.
Saturday Night
Rain likely, mainly after 10pm. Mostly cloudy, with a low around 46.
Sunday
Rain likely. Mostly cloudy, with a high near 55. Breezy.
Sunday Night
Rain. Cloudy, with a low around 51. Breezy.
Monday
Rain. Cloudy, with a high near 56. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.87°N 121.92°W (Elev. 2818 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