National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heat Persists Across the Central and Western U.S.; Fire Weather Concerns in the Rockies and High Plains

Record-breaking heat expected in the Central and Western U.S. for the next several days. Gusty winds and low relative humidity will create elevated to critical fire weather conditions over portions of the Rockies and High Plains Wednesday and Thursday. Rain and mountain snow are possible across the Pacific Northwest into the Rockies through Wednesday. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

64°F

18°C

Humidity 13%
Wind Speed WNW 9 MPH
Barometer NA
Dewpoint 13°F (-11°C)
Visibility NA
Last update 24 Mar 09:05 PM PDT
Extended Forecast for

2 Miles SSE Clayton CA

  • Tonight

    Tonight: Mostly clear, with a low around 55. Southwest wind around 9 mph, with gusts as high as 18 mph.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 78. West wind 9 to 14 mph, with gusts as high as 25 mph.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 49. West southwest wind 8 to 14 mph, with gusts as high as 28 mph.

    Low: 49 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 76. South southwest wind 7 to 11 mph becoming north in the morning. Winds could gust as high as 22 mph.

    High: 76 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 56. North wind 6 to 10 mph becoming west after midnight. Winds could gust as high as 21 mph.

    Low: 56 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 79.

    High: 79 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 55. Southwest wind around 9 mph, with gusts as high as 18 mph.
Wednesday
Sunny, with a high near 78. West wind 9 to 14 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly clear, with a low around 49. West southwest wind 8 to 14 mph, with gusts as high as 28 mph.
Thursday
Mostly sunny, with a high near 76. South southwest wind 7 to 11 mph becoming north in the morning. Winds could gust as high as 22 mph.
Thursday Night
Partly cloudy, with a low around 56. North wind 6 to 10 mph becoming west after midnight. Winds could gust as high as 21 mph.
Friday
Partly sunny, with a high near 79.
Friday Night
Partly cloudy, with a low around 52.
Saturday
Sunny, with a high near 80.
Saturday Night
Partly cloudy, with a low around 53.
Sunday
Mostly sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 55.
Monday
A slight chance of rain. Partly sunny, with a high near 71.
Monday Night
A chance of rain. Mostly cloudy, with a low around 54.
Tuesday
A chance of rain. Partly sunny, with a high near 66.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE Clayton CA
 37.92°N 121.93°W (Elev. 600 ft)
Last Update:
8:51 pm PDT Mar 24, 2026
Forecast Valid:
11pm PDT Mar 24, 2026-6pm PDT Mar 31, 2026
 
Forecast Discussion
 
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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation