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 33%
Wind Speed SW 8 MPH
Barometer NA
Dewpoint 46°F (8°C)
Visibility NA
Heat Index78°F (26°C)
Last update 28 Aug 02:59 AM PDT
Extended Forecast for

11 Miles W Quartz Hill CA

Extreme Heat Warning August 28, 03:28am until August 28, 08:00pm
Red Flag Warning August 28, 03:28am until August 28, 03:00pm
Click here for hazard details and duration
Extreme Heat Warning
Red Flag Warning
  •  
    Extreme Heat Warning August 28, 03:28am until August 28, 08:00pm
    Red Flag Warning August 28, 03:28am until August 28, 03:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 73 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 88. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 88 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around 68. Southwest wind 10 to 15 mph becoming west northwest in the evening. Winds could gust as high as 25 mph.

    Low: 68 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 85. Breezy, with a west wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 85 °F

    Sunny then
    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Clear, with a low around 63. Breezy, with a southwest wind 15 to 20 mph becoming west northwest 10 to 15 mph in the evening. Winds could gust as high as 30 mph.

    Low: 63 °F

    Clear and
    Breezy then
    Clear

  • Sunday

    Sunday: Sunny, with a high near 81. Breezy.

    High: 81 °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 76. Breezy.

    High: 76 °F

    Sunny then
    Sunny and
    Breezy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 73. West northwest wind around 5 mph.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 88. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Friday Night
Mostly clear, with a low around 68. Southwest wind 10 to 15 mph becoming west northwest in the evening. Winds could gust as high as 25 mph.
Saturday
Sunny, with a high near 85. Breezy, with a west wind 10 to 20 mph, with gusts as high as 30 mph.
Saturday Night
Clear, with a low around 63. Breezy, with a southwest wind 15 to 20 mph becoming west northwest 10 to 15 mph in the evening. Winds could gust as high as 30 mph.
Sunday
Sunny, with a high near 81. Breezy.
Sunday Night
Clear, with a low around 60. Breezy.
Monday
Sunny, with a high near 76. Breezy.
Monday Night
Mostly clear, with a low around 56. Breezy.
Tuesday
A slight chance of showers after 11am. Sunny, with a high near 74. Breezy.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 58. Breezy.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 75.
Wednesday Night
Partly cloudy, with a low around 61.
Thursday
A slight chance of showers. Mostly sunny, with a high near 79.
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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:
12:16 am PDT Aug 28, 2026
Forecast Valid:
3am PDT Aug 28, 2026-6pm PDT Sep 3, 2026
 
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