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

72°F

22°C

Humidity 52%
Wind Speed SSW 24 MPH
Barometer NA
Dewpoint 53°F (12°C)
Visibility NA
Last update 13 Aug 01:59 PM PDT
Extended Forecast for

11 Miles WSW Quartz Hill CA

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 75. Breezy, with a southwest wind around 20 mph, with gusts as high as 30 mph.

    High: 75 °F

    Partly Sunny
    and Breezy

  • Tonight

    Tonight: Mostly cloudy, 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

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Friday

    Friday: Partly sunny, then gradually becoming sunny, with a high near 75. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 75 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 53. Southwest wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.

    Low: 53 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 80. South southwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 80 °F

    Sunny

  • Saturday Night

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

    Low: 57 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 75. Breezy, with a southwest wind around 20 mph, with gusts as high as 30 mph.
Tonight
Mostly cloudy, 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
Partly sunny, then gradually becoming sunny, with a high near 75. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Friday Night
Clear, with a low around 53. Southwest wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.
Saturday
Sunny, with a high near 80. South southwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Sunny, with a high near 83.
Sunday Night
Partly cloudy, with a low around 60.
Monday
Mostly sunny, with a high near 83.
Monday Night
Mostly clear, with a low around 60.
Tuesday
Mostly sunny, with a high near 85.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
11 Miles WSW Quartz Hill CA
 34.6°N 118.39°W (Elev. 3373 ft)
Last Update:
1:47 pm PDT Aug 13, 2026
Forecast Valid:
2pm PDT Aug 13, 2026-6pm PDT Aug 19, 2026
 
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