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

76°F

24°C

Humidity 29%
Wind Speed SW 12 MPH
Barometer NA
Dewpoint 41°F (5°C)
Visibility NA
Heat Index77°F (25°C)
Last update 22 Aug 09:59 PM PDT
Extended Forecast for

7 Miles WSW Quartz Hill CA

Extreme Heat Watch August 25, 10:00am until August 28, 08:00pm
Heat Advisory August 23, 10:00am until August 25, 10:00am
Click here for hazard details and duration
Extreme Heat Watch
Heat Advisory

  • Tonight

    Tonight: Clear, with a low around 71. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 71 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 93. 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: 93 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 72. Breezy, with a west southwest wind 10 to 20 mph, with gusts as high as 30 mph.

    Low: 72 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Monday

    Monday: Sunny, with a high near 93. Breezy, with a southwest wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph.

    High: 93 °F

    Sunny and
    Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 74. Breezy, with a west wind 15 to 20 mph decreasing to 10 to 15 mph in the evening. Winds could gust as high as 30 mph.

    Low: 74 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 75. Breezy.

    Low: 75 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

Detailed Forecast

Tonight
Clear, with a low around 71. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 93. 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
Mostly clear, with a low around 72. Breezy, with a west southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Monday
Sunny, with a high near 93. Breezy, with a southwest wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph.
Monday Night
Mostly clear, with a low around 74. Breezy, with a west wind 15 to 20 mph decreasing to 10 to 15 mph in the evening. Winds could gust as high as 30 mph.
Tuesday
Sunny, with a high near 93.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Sunny, with a high near 94.
Wednesday Night
Mostly clear, with a low around 75. Breezy.
Thursday
Sunny, with a high near 93.
Thursday Night
Partly cloudy, with a low around 75. Breezy.
Friday
Sunny, with a high near 93.
Friday Night
Mostly clear, with a low around 74. Breezy.
Saturday
Sunny, with a high near 91.
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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:
7:41 pm PDT Aug 22, 2026
Forecast Valid:
10pm PDT Aug 22, 2026-6pm PDT Aug 29, 2026
 
Forecast Discussion
 
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