Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Severe thunderstorms are forecast across parts of the Upper Midwest into the Great Lakes, the Northeast, and the central High Plains. Critical fire weather conditions will continue across portions of the Four Corners and Great Basin. Read More >

Current conditions at

DIABLO GRANDE (DBLC1)

Lat: 37.32927°NLon: 121.29538°WElev: 1861.0ft.

NA

78°F

26°C

Humidity 31%
Wind Speed SSW 7 MPH
Barometer NA
Dewpoint 45°F (7°C)
Visibility NA
Heat Index78°F (26°C)
Last update 01 Jul 02:00 PM PDT
Extended Forecast for

15 Miles ENE San Martin CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 74. Southwest wind 11 to 13 mph, with gusts as high as 21 mph.

    High: 74 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 50. Southwest wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 50 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 78. Southwest wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 78 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 51. West southwest wind 5 to 9 mph, with gusts as high as 20 mph.

    Low: 51 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 84. West southwest wind 5 to 9 mph.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 54.

    Low: 54 °F

    Clear

  • Independence Day

    Independence Day: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 74. Southwest wind 11 to 13 mph, with gusts as high as 21 mph.
Tonight
Mostly clear, with a low around 50. Southwest wind 6 to 10 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 78. Southwest wind 6 to 11 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 51. West southwest wind 5 to 9 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 84. West southwest wind 5 to 9 mph.
Friday Night
Clear, with a low around 54.
Independence Day
Sunny, with a high near 87.
Saturday Night
Mostly clear, with a low around 55.
Sunday
Sunny, with a high near 84.
Sunday Night
Mostly clear, with a low around 53.
Monday
Sunny, with a high near 82.
Monday Night
Mostly clear, with a low around 52.
Tuesday
Sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
15 Miles ENE San Martin CA
 37.19°N 121.37°W (Elev. 1467 ft)
2:00 pm PDT Jul 1, 2026
2pm PDT Jul 1, 2026-6pm PDT Jul 7, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database