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

64°F

18°C

Humidity 42%
Wind Speed SW 16 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Last update 24 Jun 05:59 AM PDT
Extended Forecast for

11 Miles WSW Quartz Hill CA

Heat Advisory June 24, 06:30am until June 25, 09:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory June 24, 06:30am until June 25, 09:00pm

    NOW until 9:00pm Thu

    Heat Advisory

  • Today

    High: 88 °F

    Sunny then
    Sunny and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 59. West southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 85. 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: 85 °F

    Sunny then
    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Clear, with a low around 53. Breezy, with a southwest wind 15 to 20 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 30 mph.

    Low: 53 °F

    Clear and
    Breezy then
    Clear

  • Friday

    Friday: Sunny, with a high near 83. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 83 °F

    Sunny and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 52. Breezy.

    Low: 52 °F

    Clear and
    Breezy then
    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 74. Breezy.

    High: 74 °F

    Sunny then
    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 50. Breezy.

    Low: 50 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

Detailed Forecast

Today
Sunny, with a high near 88. Breezy, with a south southwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
Tonight
Mostly clear, with a low around 59. West southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
Sunny, with a high near 85. 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.
Thursday Night
Clear, with a low around 53. Breezy, with a southwest wind 15 to 20 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 30 mph.
Friday
Sunny, with a high near 83. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Friday Night
Mostly clear, with a low around 52. Breezy.
Saturday
Sunny, with a high near 74. Breezy.
Saturday Night
Mostly clear, with a low around 50. Breezy.
Sunday
Sunny, with a high near 73.
Sunday Night
Clear, with a low around 49.
Monday
Sunny, with a high near 76.
Monday Night
Clear, with a low around 50.
Tuesday
Sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
11 Miles WSW Quartz Hill CA
 34.62°N 118.42°W (Elev. 2989 ft)
Last Update:
2:08 am PDT Jun 24, 2026
Forecast Valid:
6am PDT Jun 24, 2026-6pm PDT Jun 30, 2026
 
Forecast Discussion
 
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Additional Resources

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