Critical Fire Weather in the High Plains; Heavy Snow in the Western Mountains and Northern Plains

Gusty winds and low relative humidity will bring critical fire weather to the central and southern High Plains Wednesday. Two Pacific storms will continue impacting the mountains of the western U.S. into Thursday with gusty winds and heavy snow. Heavy snow and gusty winds will continue to impact the northern Plains into the central Great Lakes Wednesday. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

27°F

-3°C

Humidity 98%
Wind Speed N 0 MPH
Barometer NA
Dewpoint 27°F (-3°C)
Visibility NA
Last update 18 Feb 01:25 AM PST
Extended Forecast for

4 Miles SSE Clayton CA

  • Overnight

    Overnight: Partly cloudy, with a low around 32. Northwest wind 8 to 15 mph, with gusts as high as 29 mph.

    Low: 32 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of snow between 7am and 4pm.  Partly sunny, with a high near 39. Southwest wind 6 to 10 mph.  Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    High: 39 °F

    Chance Snow

  • Wednesday Night

    Wednesday Night: Rain and snow.  Steady temperature around 37. Southwest wind 5 to 14 mph becoming south southeast in the evening. Winds could gust as high as 22 mph.  Chance of precipitation is 90%. New snow accumulation of around an inch possible.

    Low: 37 °F

    Chance Snow
    then
    Rain/Snow

  • Thursday

    Thursday: Rain and snow, becoming all snow after 7am.  High near 41. Breezy, with a west wind 9 to 14 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 40 mph.  Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    High: 41 °F

    Breezy.
    Rain/Snow
    then Chance
    Snow

  • Thursday Night

    Thursday Night: A 20 percent chance of snow before 10pm.  Mostly clear, with a low around 33. West wind 10 to 18 mph, with gusts as high as 33 mph.

    Low: 33 °F

    Slight Chance
    Snow then
    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 10 percent chance of snow after 4am.  Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Saturday

    Saturday: A slight chance of rain and snow before 10am, then a chance of rain.  Partly sunny, with a high near 49.

    High: 49 °F

    Slight Chance
    Rain/Snow
    then Chance
    Rain

  • Saturday Night

    Saturday Night: Rain, mainly after 10pm.  Mostly cloudy, with a low around 46. Breezy.

    Low: 46 °F

    Rain and
    Breezy

Detailed Forecast

Overnight
Partly cloudy, with a low around 32. Northwest wind 8 to 15 mph, with gusts as high as 29 mph.
Wednesday
A chance of snow between 7am and 4pm. Partly sunny, with a high near 39. Southwest wind 6 to 10 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Wednesday Night
Rain and snow. Steady temperature around 37. Southwest wind 5 to 14 mph becoming south southeast in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.
Thursday
Rain and snow, becoming all snow after 7am. High near 41. Breezy, with a west wind 9 to 14 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Thursday Night
A 20 percent chance of snow before 10pm. Mostly clear, with a low around 33. West wind 10 to 18 mph, with gusts as high as 33 mph.
Friday
Mostly sunny, with a high near 43.
Friday Night
A 10 percent chance of snow after 4am. Mostly cloudy, with a low around 37.
Saturday
A slight chance of rain and snow before 10am, then a chance of rain. Partly sunny, with a high near 49.
Saturday Night
Rain, mainly after 10pm. Mostly cloudy, with a low around 46. Breezy.
Sunday
Rain. Mostly cloudy, with a high near 55. Breezy.
Sunday Night
Rain. Cloudy, with a low around 52. Breezy.
Monday
Rain. Cloudy, with a high near 57. Breezy.
Monday Night
Rain. Cloudy, with a low around 50.
Tuesday
Rain. Mostly cloudy, with a high near 54.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
12:27 am PST Feb 18, 2026
1am PST Feb 18, 2026-6pm PST Feb 24, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database