Critical Fire Weather in the Southern High Plains; Heavy Snow in the Great Lakes and Northeast U.S.

Gusty winds and low relative humidity will bring elevated to critical fire weather conditions to the southern High Plains through the weekend. A winter storm will track across the Great Lakes and Northeast U.S. into Saturday with areas of wintry mix and heavy snow from northern New York through southern Maine. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

28°F

-2°C

Humidity 99%
Wind Speed N 0 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Last update 20 Feb 03:25 AM PST
Extended Forecast for

4 Miles ENE Danville CA

Cold Weather Advisory until February 21, 09:00am
Click here for hazard details and duration
Cold Weather Advisory
  •  
    Cold Weather Advisory until February 21, 09:00am

    NOW until 9:00am Sat

    Cold Weather Advisory

  • Overnight

    Low: 35 °F

    Areas Frost

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 58. South wind 6 to 10 mph, with gusts as high as 22 mph.

    High: 58 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 40. South southeast wind around 9 mph, with gusts as high as 20 mph.

    Low: 40 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 64. South wind around 7 mph.

    High: 64 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 42. Light and variable wind.

    Low: 42 °F

    Mostly Cloudy

  • Monday

    Monday: A 10 percent chance of rain after 4pm.  Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Rain likely, mainly after 4am.  Mostly cloudy, with a low around 51. Chance of precipitation is 60%.

    Low: 51 °F

    Rain Likely

  • Tuesday

    Tuesday: Rain.  Mostly cloudy, with a high near 61.

    High: 61 °F

    Rain

Detailed Forecast

Overnight
Areas of frost between 2am and 3am. Otherwise, mostly cloudy, with a low around 35. East southeast wind around 5 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 58. South wind 6 to 10 mph, with gusts as high as 22 mph.
Saturday Night
Partly cloudy, with a low around 40. South southeast wind around 9 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, with a high near 64. South wind around 7 mph.
Sunday Night
Mostly cloudy, with a low around 42. Light and variable wind.
Monday
A 10 percent chance of rain after 4pm. Partly sunny, with a high near 65.
Monday Night
Rain likely, mainly after 4am. Mostly cloudy, with a low around 51. Chance of precipitation is 60%.
Tuesday
Rain. Mostly cloudy, with a high near 61.
Tuesday Night
Rain, mainly before 10pm. Cloudy, with a low around 50.
Wednesday
A chance of rain. Mostly cloudy, with a high near 63.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 47.
Thursday
A slight chance of rain. Partly sunny, with a high near 66.
Thursday Night
A slight chance of rain. Mostly cloudy, with a low around 47.
Friday
Mostly sunny, with a high near 68.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ENE Danville CA
 37.85°N 121.94°W (Elev. 1362 ft)
12:26 am PST Feb 21, 2026
1am PST Feb 21, 2026-6pm PST Feb 27, 2026
 
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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