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

Hazardous Weather Conditions

Current conditions at

GRASS MOUNTAIN (GMTC1)

Lat: 34.64078°NLon: 118.41435°WElev: 4626.0ft.

NA

77°F

25°C

Humidity 11%
Wind Speed SW 15 MPH
Barometer NA
Dewpoint 19°F (-7°C)
Visibility NA
Heat Index76°F (24°C)
Last update 01 Aug 07:59 PM PDT
Extended Forecast for

7 Miles WSW Quartz Hill CA

Extreme Heat Warning August 1, 08:48pm until August 2, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 1, 08:48pm until August 2, 08:00pm

    NOW until 8:00pm Sun

    Extreme Heat Warning

  • Tonight

    Low: 73 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 94. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 94 °F

    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Clear, with a low around 69. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 69 °F

    Clear and
    Breezy then
    Clear

  • Monday

    Monday: Sunny, with a high near 91. Breezy, with a southwest wind 15 to 25 mph, with gusts as high as 30 mph.

    High: 91 °F

    Sunny and
    Breezy

  • Monday Night

    Monday Night: Clear, with a low around 69. Breezy, with a southwest wind 15 to 25 mph, with gusts as high as 35 mph.

    Low: 69 °F

    Clear and
    Breezy then
    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 87. Breezy.

    High: 87 °F

    Sunny then
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: Clear, with a low around 69. Breezy.

    Low: 69 °F

    Clear and
    Breezy then
    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 89. Breezy.

    High: 89 °F

    Sunny then
    Sunny and
    Breezy

Detailed Forecast

Tonight
Clear, with a low around 73. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 94. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Clear, with a low around 69. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Monday
Sunny, with a high near 91. Breezy, with a southwest wind 15 to 25 mph, with gusts as high as 30 mph.
Monday Night
Clear, with a low around 69. Breezy, with a southwest wind 15 to 25 mph, with gusts as high as 35 mph.
Tuesday
Sunny, with a high near 87. Breezy.
Tuesday Night
Clear, with a low around 69. Breezy.
Wednesday
Sunny, with a high near 89. Breezy.
Wednesday Night
Clear, with a low around 70. Breezy.
Thursday
Sunny, with a high near 90.
Thursday Night
Clear, with a low around 71. Breezy.
Friday
Sunny, with a high near 91.
Friday Night
Clear, with a low around 72.
Saturday
Sunny, with a high near 90.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
7 Miles WSW Quartz Hill CA
 34.59°N 118.3°W (Elev. 4199 ft)
Last Update:
8:26 pm PDT Aug 1, 2026
Forecast Valid:
8pm PDT Aug 1, 2026-6pm PDT Aug 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