Heat Persists in the Southwest; Elevated to Critical Fire Weather in the Great Basin; Poor Air Quality in the West

Dangerous heat will persist across the Southwest U.S. through this week, easing by next week. The heat will focus further east in the Great Plains and Mississippi Valley beginning next week. Elevated to locally critical fire weather conditions will persist for the Great Basin today. Poor air quality lingers for the Northwest, Great Basin, Central Rockies into the Plains. Read More >

Current conditions at

DIABLO GRANDE (DBLC1)

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

NA

73°F

23°C

Humidity 36%
Wind Speed S 7 MPH
Barometer NA
Dewpoint 44°F (7°C)
Visibility NA
Last update 04 Aug 06:00 AM PDT
Extended Forecast for

21 Miles ENE San Martin CA

  • Today

    Today: Sunny, with a high near 94. Southwest wind 7 to 13 mph, with gusts as high as 22 mph.

    High: 94 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 64. Southwest wind 9 to 13 mph, with gusts as high as 20 mph.

    Low: 64 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94. West southwest wind 6 to 10 mph, with gusts as high as 18 mph.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 64. West southwest wind 7 to 10 mph, with gusts as high as 20 mph.

    Low: 64 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 96. West wind 6 to 8 mph becoming south southeast in the morning.

    High: 96 °F

    Hot

  • Thursday Night

    Thursday Night: Clear, with a low around 66.

    Low: 66 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

  • Friday Night

    Friday Night: Clear, with a low around 68.

    Low: 68 °F

    Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

Detailed Forecast

Today
Sunny, with a high near 94. Southwest wind 7 to 13 mph, with gusts as high as 22 mph.
Tonight
Clear, with a low around 64. Southwest wind 9 to 13 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 94. West southwest wind 6 to 10 mph, with gusts as high as 18 mph.
Wednesday Night
Clear, with a low around 64. West southwest wind 7 to 10 mph, with gusts as high as 20 mph.
Thursday
Sunny and hot, with a high near 96. West wind 6 to 8 mph becoming south southeast in the morning.
Thursday Night
Clear, with a low around 66.
Friday
Sunny and hot, with a high near 97.
Friday Night
Clear, with a low around 68.
Saturday
Sunny and hot, with a high near 97.
Saturday Night
Mostly clear, with a low around 67.
Sunday
Sunny, with a high near 92.
Sunday Night
Clear, with a low around 61.
Monday
Sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
21 Miles ENE San Martin CA
 37.17°N 121.23°W (Elev. 2211 ft)
2:00 am PDT Aug 4, 2026
6am PDT Aug 4, 2026-6pm PDT Aug 10, 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