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

Remnants of Arthur and Heavy Rainfall Across the South; Fire Weather Threat in the West

Life-threatening, potentially catastrophic flash flooding expected along the central Gulf Coast as the remnants of Arthur track across the area. Isolated brief tornadoes and damaging gusts remain possible overnight in the Southeast. Isolated to scattered dry thunderstorms may cause lightning-ignited fires and erratic behavior due to gusty winds across parts of the West Friday. Read More >

Current conditions at

DIABLO GRANDE (DBLC1)

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

NA

58°F

14°C

Humidity 73%
Wind Speed S 19 MPH
Barometer NA
Dewpoint 49°F (9°C)
Visibility NA
Last update 18 Jun 10:00 PM PDT
Extended Forecast for

21 Miles ENE San Martin CA

  • Tonight

    Tonight: Partly cloudy, with a low around 53. Southwest wind 13 to 20 mph, with gusts as high as 28 mph.

    Low: 53 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Partly sunny, then gradually becoming sunny, with a high near 72. Southwest wind 11 to 14 mph, with gusts as high as 22 mph.

    High: 72 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 52. West southwest wind 10 to 18 mph, with gusts as high as 26 mph.

    Low: 52 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 75. West southwest wind 6 to 9 mph, with gusts as high as 18 mph.

    High: 75 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 51. West southwest wind 11 to 13 mph, with gusts as high as 20 mph.

    Low: 51 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 53. Southwest wind 13 to 20 mph, with gusts as high as 28 mph.
Juneteenth
Partly sunny, then gradually becoming sunny, with a high near 72. Southwest wind 11 to 14 mph, with gusts as high as 22 mph.
Friday Night
Mostly clear, with a low around 52. West southwest wind 10 to 18 mph, with gusts as high as 26 mph.
Saturday
Sunny, with a high near 75. West southwest wind 6 to 9 mph, with gusts as high as 18 mph.
Saturday Night
Mostly clear, with a low around 51. West southwest wind 11 to 13 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 80.
Sunday Night
Mostly clear, with a low around 54.
Monday
Sunny, with a high near 83.
Monday Night
Mostly clear, with a low around 56.
Tuesday
Sunny, with a high near 87.
Tuesday Night
Mostly clear, with a low around 58.
Wednesday
Sunny, with a high near 88.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
21 Miles ENE San Martin CA
 37.17°N 121.23°W (Elev. 2211 ft)
Last Update:
8:46 pm PDT Jun 18, 2026
Forecast Valid:
10pm PDT Jun 18, 2026-6pm PDT Jun 25, 2026
 
Forecast Discussion
 
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