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

Storm Impacting the Southwest U.S.; Above Normal Temperatures Further East

A storm system will shift across the southwest U.S. through Thursday with widespread showers and isolated thunderstorms. Isolated flooding is possible. High-elevation snow is also expected in parts of Nevada and the southern Sierra Nevada range. East of this storm, above average temperatures will challenge or break daily record high temperatures this week in the southern Plains and southeast U.S. Read More >

Current conditions at

DIABLO GRANDE (DBLC1)

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

NA

47°F

8°C

Humidity 93%
Wind Speed ENE 5 MPH
Barometer NA
Dewpoint 45°F (7°C)
Visibility NA
Wind Chill45°F (7°C)
Last update 18 Nov 10:00 AM PST
Extended Forecast for

18 Miles ENE Mount Hamilton CA

  • Today

    Today: Sunny, with a high near 50. North wind around 6 mph becoming east in the afternoon.

    High: 50 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 43. Light west southwest wind.

    Low: 43 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a steady temperature around 45. Light and variable wind becoming southeast around 6 mph in the morning.

    High: 45 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after 10pm. Mostly cloudy, with a low around 44. Calm wind becoming south around 5 mph after midnight. New precipitation amounts of less than a tenth of an inch possible.

    Low: 44 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers likely, mainly before 4pm. Mostly cloudy, with a high near 47. Southeast wind 6 to 8 mph. Chance of precipitation is 70%.

    High: 47 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before 10pm. Mostly cloudy, with a low around 45.

    Low: 45 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 50. North wind around 6 mph becoming east in the afternoon.
Tonight
Mostly clear, with a low around 43. Light west southwest wind.
Wednesday
Mostly sunny, with a steady temperature around 45. Light and variable wind becoming southeast around 6 mph in the morning.
Wednesday Night
A 30 percent chance of showers after 10pm. Mostly cloudy, with a low around 44. Calm wind becoming south around 5 mph after midnight. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Showers likely, mainly before 4pm. Mostly cloudy, with a high near 47. Southeast wind 6 to 8 mph. Chance of precipitation is 70%.
Thursday Night
A 20 percent chance of showers before 10pm. Mostly cloudy, with a low around 45.
Friday
Mostly sunny, with a high near 49.
Friday Night
Mostly clear, with a low around 44.
Saturday
Sunny, with a high near 52.
Saturday Night
Mostly clear, with a low around 46.
Sunday
Sunny, with a high near 53.
Sunday Night
Partly cloudy, with a low around 46.
Monday
Mostly sunny, with a high near 54.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
18 Miles ENE Mount Hamilton CA
 37.46°N 121.36°W (Elev. 2451 ft)
Last Update:
1:21 am PST Nov 18, 2025
Forecast Valid:
10am PST Nov 18, 2025-6pm PST Nov 24, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation