Dangerous Fire Conditions in the Southern High Plains; Severe Weather from the Great Lakes into Central/Southern Plains; Late-Season Mountain Snow

Dry and windy conditions will produce dangerous fire weather conditions across the southern High Plains into the Southwest. Severe storms, including very large hail, strong tornadoes, and winds, are expected from the Great Lakes into the central/southern Plains. Heavy late-season snow and cold temperatures are expected in the northern to central Rockies. Heat is spreading across the eastern U.S.. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

56°F

13°C

Humidity 28%
Wind Speed NW 9 MPH
Barometer NA
Dewpoint 23°F (-5°C)
Visibility NA
Last update 17 May 05:05 PM PDT
Extended Forecast for

4 Miles SSE Clayton CA

Wind Advisory May 17, 11:00pm until May 18, 11:00am
Click here for hazard details and duration
Wind Advisory
  • Tonight

    Tonight: Clear, with a temperature rising to around 73 by 11pm. Breezy, with a north wind 22 to 29 mph, with gusts as high as 55 mph.

    Low: 68 °F

    Clear and
    Breezy

  • Monday

    Monday: Sunny, with a high near 76. Windy, with a north wind 25 to 30 mph decreasing to 11 to 16 mph in the afternoon. Winds could gust as high as 55 mph.

    High: 76 °F

    Sunny and
    Windy

  • Monday Night

    Monday Night: Clear, with a low around 60. North northwest wind 7 to 10 mph becoming west southwest in the evening. Winds could gust as high as 20 mph.

    Low: 60 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 78. North wind 6 to 10 mph, with gusts as high as 18 mph.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 66. Northwest wind 8 to 11 mph becoming southwest in the evening. Winds could gust as high as 21 mph.

    Low: 66 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 57.

    Low: 57 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 55.

    Low: 55 °F

    Clear

Detailed Forecast

Tonight
Clear, with a temperature rising to around 73 by 11pm. Breezy, with a north wind 22 to 29 mph, with gusts as high as 55 mph.
Monday
Sunny, with a high near 76. Windy, with a north wind 25 to 30 mph decreasing to 11 to 16 mph in the afternoon. Winds could gust as high as 55 mph.
Monday Night
Clear, with a low around 60. North northwest wind 7 to 10 mph becoming west southwest in the evening. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 78. North wind 6 to 10 mph, with gusts as high as 18 mph.
Tuesday Night
Clear, with a low around 66. Northwest wind 8 to 11 mph becoming southwest in the evening. Winds could gust as high as 21 mph.
Wednesday
Sunny, with a high near 80.
Wednesday Night
Clear, with a low around 57.
Thursday
Sunny, with a high near 87.
Thursday Night
Clear, with a low around 55.
Friday
Sunny, with a high near 80.
Friday Night
Mostly clear, with a low around 53.
Saturday
Sunny, with a high near 74.
Saturday Night
Mostly clear, with a low around 52.
Sunday
Sunny, with a high near 74.
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)
8:42 pm PDT May 17, 2026
8pm PDT May 17, 2026-6pm PDT May 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