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

70°F

21°C

Humidity 23%
Wind Speed SSW 29 MPH
Barometer NA
Dewpoint 30°F (-1°C)
Visibility NA
Last update 01 Sep 11:59 AM PDT
Extended Forecast for

10 Miles WSW Quartz Hill CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 76. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 35 mph.

    High: 76 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Clear, with a low around 51. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.

    Low: 51 °F

    Clear and
    Breezy then
    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 74. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 74 °F

    Sunny then
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Clear, with a low around 53. Breezy, with a west 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

  • Thursday

    Thursday: Sunny, with a high near 74. West wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 74 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 53.

    Low: 53 °F

    Clear

  • Friday

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

    High: 74 °F

    Sunny then
    Sunny and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 54. Breezy.

    Low: 54 °F

    Clear and
    Breezy then
    Mostly Clear

  • Saturday

    Saturday: A slight chance of showers after 11am. Mostly sunny, with a high near 77.

    High: 77 °F

    Slight Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 76. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 35 mph.
Tonight
Clear, with a low around 51. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Wednesday
Sunny, with a high near 74. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
Clear, with a low around 53. Breezy, with a west wind 15 to 20 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 30 mph.
Thursday
Sunny, with a high near 74. West wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Clear, with a low around 53.
Friday
Sunny, with a high near 74. Breezy.
Friday Night
Mostly clear, with a low around 54. Breezy.
Saturday
A slight chance of showers after 11am. Mostly sunny, with a high near 77.
Saturday Night
A chance of showers, mainly after 11pm. Mostly cloudy, with a low around 58.
Sunday
A chance of showers. Partly sunny, with a high near 76.
Sunday Night
A chance of showers. Partly cloudy, with a low around 59.
Labor Day
A chance of showers. Partly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
10 Miles WSW Quartz Hill CA
 34.6°N 118.39°W (Elev. 3373 ft)
Last Update:
12:06 pm PDT Sep 1, 2026
Forecast Valid:
12pm PDT Sep 1, 2026-6pm PDT Sep 7, 2026
 
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