National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

GRASS MOUNTAIN (GMTC1)

Lat: 34.64078°NLon: 118.41435°WElev: 4626.0ft.

NA

61°F

16°C

Humidity 97%
Wind Speed SW 4 MPH
Barometer NA
Dewpoint 60°F (16°C)
Visibility NA
Last update 06 Sep 06:59 PM PDT
Extended Forecast for

7 Miles WSW Quartz Hill CA

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 63. West southwest wind around 10 mph.

    Low: 63 °F

    Decreasing
    Clouds

  • Labor Day

    Labor Day: Sunny, with a high near 77. 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: 77 °F

    Sunny then
    Sunny and
    Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 68. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 68 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of showers before 11am. Mostly sunny, with a high near 85. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 85 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 73. West southwest wind 5 to 15 mph becoming northwest after midnight. Winds could gust as high as 20 mph.

    Low: 73 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 75.

    Low: 75 °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 74.

    Low: 74 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming clear, with a low around 63. West southwest wind around 10 mph.
Labor Day
Sunny, with a high near 77. 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.
Monday Night
Mostly clear, with a low around 68. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday
A 20 percent chance of showers before 11am. Mostly sunny, with a high near 85. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 73. West southwest wind 5 to 15 mph becoming northwest after midnight. Winds could gust as high as 20 mph.
Wednesday
Mostly sunny, with a high near 87.
Wednesday Night
Mostly clear, with a low around 75.
Thursday
Sunny, with a high near 88.
Thursday Night
Mostly clear, with a low around 74.
Friday
Sunny, with a high near 84.
Friday Night
Clear, with a low around 66. Breezy.
Saturday
Sunny, with a high near 77. Breezy.
Saturday Night
Clear, with a low around 63. Breezy.
Sunday
Sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
7 Miles WSW Quartz Hill CA
 34.59°N 118.3°W (Elev. 4199 ft)
Last Update:
12:52 pm PDT Sep 6, 2026
Forecast Valid:
7pm PDT Sep 6, 2026-6pm PDT Sep 13, 2026
 
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Additional Resources

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