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 14 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Wind Chill22°F (-6°C)
Last update 17 Feb 04:55 AM PST
Extended Forecast for

4 Miles S Clayton CA

  • Overnight

    Overnight: Rain likely, possibly mixed with snow. Mostly cloudy, with a steady temperature around 41. South southwest wind around 18 mph, with gusts as high as 33 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 41 °F

    Rain/Snow
    Likely

  • Tuesday

    Tuesday: Rain and snow showers. Some thunder is also possible. Temperature falling to around 36 by 11am. Windy, with a southwest wind 24 to 31 mph, with gusts as high as 49 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    High: 41 °F⇓

    Rain/Snow and
    Windy

  • Tuesday Night

    Tuesday Night: 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 high near 43. 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: 43 °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. 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.

    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

Detailed Forecast

Overnight
Rain likely, possibly mixed with snow. Mostly cloudy, with a steady temperature around 41. South southwest wind around 18 mph, with gusts as high as 33 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.
Tuesday
Rain and snow showers. Some thunder is also possible. Temperature falling to around 36 by 11am. Windy, with a southwest wind 24 to 31 mph, with gusts as high as 49 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Tuesday Night
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 high near 43. 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. 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.
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. 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 S Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
Last Update:
3:53 am PST Feb 17, 2026
Forecast Valid:
5am 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