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 36%
Wind Speed SW 9 MPH
Barometer NA
Dewpoint 47°F (8°C)
Visibility NA
Heat Index78°F (26°C)
Last update 28 Aug 05:59 AM PDT
Extended Forecast for

11 Miles W Quartz Hill CA

Extreme Heat Warning August 28, 06:34am until August 28, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 28, 06:34am until August 28, 08:00pm

    NOW until 8:00pm Fri

    Extreme Heat Warning

  • Today

    High: 89 °F

    Mostly Cloudy
    then Mostly
    Sunny and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 67. Breezy, with a southwest wind 15 to 20 mph becoming west northwest after midnight. Winds could gust as high as 30 mph.

    Low: 67 °F

    Mostly Clear
    and Breezy
    then Clear

  • Saturday

    Saturday: Sunny, with a high near 87. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 87 °F

    Sunny then
    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Clear, with a low around 65. Breezy, with a southwest wind 10 to 20 mph becoming west northwest in the evening. Winds could gust as high as 30 mph.

    Low: 65 °F

    Clear and
    Breezy then
    Clear

  • Sunday

    Sunday: Sunny, with a high near 83. Breezy, with a west northwest wind 10 to 15 mph becoming southwest 20 to 25 mph in the afternoon. Winds could gust as high as 35 mph.

    High: 83 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Clear, with a low around 60. Breezy.

    Low: 60 °F

    Clear and
    Breezy then
    Clear

  • Monday

    Monday: Sunny, with a high near 78. Breezy.

    High: 78 °F

    Sunny and
    Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 58. Breezy.

    Low: 58 °F

    Clear and
    Breezy then
    Mostly Clear

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 89. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Tonight
Mostly clear, with a low around 67. Breezy, with a southwest wind 15 to 20 mph becoming west northwest after midnight. Winds could gust as high as 30 mph.
Saturday
Sunny, with a high near 87. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Saturday Night
Clear, with a low around 65. Breezy, with a southwest wind 10 to 20 mph becoming west northwest in the evening. Winds could gust as high as 30 mph.
Sunday
Sunny, with a high near 83. Breezy, with a west northwest wind 10 to 15 mph becoming southwest 20 to 25 mph in the afternoon. Winds could gust as high as 35 mph.
Sunday Night
Clear, with a low around 60. Breezy.
Monday
Sunny, with a high near 78. Breezy.
Monday Night
Mostly clear, with a low around 58. Breezy.
Tuesday
A slight chance of showers after 11am. Sunny, with a high near 76. Breezy.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 59. Breezy.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 78.
Wednesday Night
Partly cloudy, with a low around 62.
Thursday
A slight chance of showers. Mostly sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
11 Miles W Quartz Hill CA
 34.67°N 118.4°W (Elev. 3599 ft)
Last Update:
12:16 am PDT Aug 28, 2026
Forecast Valid:
6am PDT Aug 28, 2026-6pm PDT Sep 3, 2026
 
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