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

53°F

12°C

Humidity 98%
Wind Speed SW 15 MPH
Barometer NA
Dewpoint 52°F (11°C)
Visibility NA
Last update 18 Jun 08:59 PM PDT
Extended Forecast for

11 Miles W Quartz Hill CA

Extreme Heat Watch June 23, 08:00am until June 25, 09:00pm
Click here for hazard details and duration

  • Tonight

    Tonight: Mostly clear, with a low around 53. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 53 °F

    Mostly Clear
    then Partly
    Cloudy and
    Breezy

  • Juneteenth

    Juneteenth: Sunny, with a high near 73. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 73 °F

    Sunny and
    Breezy

  • Friday Night

    Friday Night: Clear, with a low around 51. Breezy, with a west southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 51 °F

    Clear and
    Breezy then
    Clear

  • Saturday

    Saturday: Sunny, with a high near 74. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 74 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Clear, with a low around 52. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 52 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 54.

    Low: 54 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 58.

    Low: 58 °F

    Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 53. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Juneteenth
Sunny, with a high near 73. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Friday Night
Clear, with a low around 51. Breezy, with a west southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Saturday
Sunny, with a high near 74. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Saturday Night
Clear, with a low around 52. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Sunday
Sunny, with a high near 75.
Sunday Night
Clear, with a low around 54.
Monday
Sunny, with a high near 83.
Monday Night
Clear, with a low around 58.
Tuesday
Sunny, with a high near 86.
Tuesday Night
Clear, with a low around 63.
Wednesday
Sunny, with a high near 88.
Wednesday Night
Mostly clear, with a low around 64.
Thursday
Sunny, with a high near 87.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
11 Miles W Quartz Hill CA
 34.65°N 118.43°W (Elev. 3832 ft)
Last Update:
12:17 pm PDT Jun 18, 2026
Forecast Valid:
9pm PDT Jun 18, 2026-6pm PDT Jun 25, 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