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

66°F

19°C

Humidity 61%
Wind Speed SSW 17 MPH
Barometer NA
Dewpoint 52°F (11°C)
Visibility NA
Last update 21 Jun 04:59 PM PDT
Extended Forecast for

11 Miles W Quartz Hill CA

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

  • Tonight

    Tonight: Clear, with a low around 56. Breezy, with a west southwest wind 10 to 20 mph, with gusts as high as 25 mph.

    Low: 56 °F

    Clear and
    Breezy then
    Clear

  • Monday

    Monday: Sunny, with a high near 87. Breezy, with a west northwest wind 10 to 15 mph becoming southwest 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 87 °F

    Sunny then
    Sunny and
    Breezy

  • Monday Night

    Monday Night: Clear, with a low around 60. West southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 60 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 91. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 91 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 63. Southwest wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 20 mph.

    Low: 63 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 60.

    Low: 60 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 56. Breezy, with a west southwest wind 10 to 20 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 87. Breezy, with a west northwest wind 10 to 15 mph becoming southwest 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
Monday Night
Clear, with a low around 60. West southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 91. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.
Tuesday Night
Clear, with a low around 63. Southwest wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 20 mph.
Wednesday
Sunny, with a high near 92.
Wednesday Night
Clear, with a low around 60.
Thursday
Sunny, with a high near 80.
Thursday Night
Mostly clear, with a low around 57.
Friday
Sunny, with a high near 77.
Friday Night
Clear, with a low around 55.
Saturday
Sunny, with a high near 73. Breezy.
Saturday Night
Clear, with a low around 52.
Sunday
Sunny, with a high near 72.
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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:
1:38 pm PDT Jun 21, 2026
Forecast Valid:
5pm PDT Jun 21, 2026-6pm PDT Jun 28, 2026
 
Forecast Discussion
 
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