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

58°F

14°C

Humidity 78%
Wind Speed SW 19 MPH
Barometer NA
Dewpoint 51°F (11°C)
Visibility NA
Last update 19 Jun 06:59 PM PDT
Extended Forecast for

7 Miles SW Quartz Hill CA

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

  • Tonight

    Tonight: Mostly clear, with a low around 54. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 54 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Saturday

    Saturday: Sunny, with a high near 69. Breezy, with a southwest wind 15 to 20 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph.

    High: 69 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Clear, with a low around 55. Breezy, with a southwest wind 20 to 25 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 40 mph.

    Low: 55 °F

    Clear and
    Breezy then
    Clear

  • Sunday

    Sunday: Sunny, with a high near 72. Breezy, with a southwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 72 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Clear, with a low around 58. Breezy, with a west southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 58 °F

    Clear and
    Breezy then
    Clear

  • Monday

    Monday: Sunny, with a high near 80. Breezy.

    High: 80 °F

    Sunny and
    Breezy

  • Monday Night

    Monday Night: Clear, with a low around 61.

    Low: 61 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 68. Breezy.

    Low: 68 °F

    Clear and
    Breezy then
    Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 54. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Saturday
Sunny, with a high near 69. Breezy, with a southwest wind 15 to 20 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph.
Saturday Night
Clear, with a low around 55. Breezy, with a southwest wind 20 to 25 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 40 mph.
Sunday
Sunny, with a high near 72. Breezy, with a southwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
Sunday Night
Clear, with a low around 58. Breezy, with a west southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Monday
Sunny, with a high near 80. Breezy.
Monday Night
Clear, with a low around 61.
Tuesday
Sunny, with a high near 85.
Tuesday Night
Clear, with a low around 68. Breezy.
Wednesday
Sunny, with a high near 87. Breezy.
Wednesday Night
Mostly clear, with a low around 69. Breezy.
Thursday
Sunny, with a high near 87. Breezy.
Thursday Night
Clear, with a low around 67. Breezy.
Friday
Sunny, with a high near 81. Breezy.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
7 Miles SW Quartz Hill CA
 34.59°N 118.3°W (Elev. 4199 ft)
Last Update:
5:53 pm PDT Jun 19, 2026
Forecast Valid:
8pm PDT Jun 19, 2026-6pm PDT Jun 26, 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