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

69°F

21°C

Humidity 52%
Wind Speed S 6 MPH
Barometer NA
Dewpoint 51°F (11°C)
Visibility NA
Last update 22 Jun 09:59 AM PDT
Extended Forecast for

12 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

  • Today

    Today: 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

  • Tonight

    Tonight: Clear, with a low around 60. West wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 60 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 92. West wind 5 to 15 mph becoming south southwest in the morning. Winds could gust as high as 20 mph.

    High: 92 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67. West wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 67 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 91. West northwest wind 5 to 15 mph becoming south southwest in the morning. Winds could gust as high as 20 mph.

    High: 91 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

Detailed Forecast

Today
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.
Tonight
Clear, with a low around 60. West wind 5 to 15 mph, with gusts as high as 25 mph.
Tuesday
Sunny, with a high near 92. West wind 5 to 15 mph becoming south southwest in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 67. West wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 91. West northwest wind 5 to 15 mph becoming south southwest in the morning. Winds could gust as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 65.
Thursday
Sunny, with a high near 88.
Thursday Night
Mostly clear, with a low around 60.
Friday
Sunny, with a high near 79.
Friday Night
Clear, with a low around 58.
Saturday
Sunny, with a high near 75. Breezy.
Saturday Night
Clear, with a low around 55. Breezy.
Sunday
Sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
12 Miles W Quartz Hill CA
 34.65°N 118.43°W (Elev. 3832 ft)
Last Update:
9:43 am PDT Jun 22, 2026
Forecast Valid:
10am PDT Jun 22, 2026-6pm PDT Jun 28, 2026
 
Forecast Discussion
 
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Additional Resources

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