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

Dangerous Heat Wave Continues; Areas of Severe Thunderstorms Today

Dangerous, record-breaking heat will continue across most of the central and eastern U.S through Friday then focusing on the eastern U.S. through the Independence Day weekend. Peak heat indices of up to 115 degrees are possible. Strong to severe thunderstorms will be possible from the northern Plains into the Midwest and Great Lakes regions, as well as across the southern Appalachians today. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

N/A

Humidity 28%
Wind Speed NW 9 MPH
Barometer NA
Dewpoint N/A
Visibility NA
Last update 17 May 05:05 PM PDT
Extended Forecast for

3 Miles S Clayton CA

  • This Afternoon

    This Afternoon: Mostly cloudy, then gradually becoming sunny, with a high near 73. West southwest wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 73 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Clear, with a low around 55. South southwest wind 9 to 13 mph, with gusts as high as 21 mph.

    Low: 55 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 76. West southwest wind 7 to 11 mph, with gusts as high as 21 mph.

    High: 76 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 58. Southwest wind around 11 mph, with gusts as high as 21 mph.

    Low: 58 °F

    Clear

  • Independence Day

    Independence Day: Sunny, with a high near 75. West southwest wind 8 to 11 mph, with gusts as high as 21 mph.

    High: 75 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, then gradually becoming sunny, with a high near 73. West southwest wind 7 to 11 mph, with gusts as high as 20 mph.
Tonight
Clear, with a low around 55. South southwest wind 9 to 13 mph, with gusts as high as 21 mph.
Friday
Sunny, with a high near 76. West southwest wind 7 to 11 mph, with gusts as high as 21 mph.
Friday Night
Clear, with a low around 58. Southwest wind around 11 mph, with gusts as high as 21 mph.
Independence Day
Sunny, with a high near 75. West southwest wind 8 to 11 mph, with gusts as high as 21 mph.
Saturday Night
Partly cloudy, with a low around 57.
Sunday
Mostly sunny, with a high near 71.
Sunday Night
Partly cloudy, with a low around 55.
Monday
Mostly sunny, with a high near 68.
Monday Night
Mostly clear, with a low around 54.
Tuesday
Sunny, with a high near 70.
Tuesday Night
Mostly clear, with a low around 54.
Wednesday
Sunny, with a high near 72.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Clayton CA
 37.9°N 121.92°W (Elev. 1900 ft)
Last Update:
12:41 pm PDT Jul 2, 2026
Forecast Valid:
12pm PDT Jul 2, 2026-6pm PDT Jul 8, 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