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

58°F

14°C

Humidity 43%
Wind Speed NE 6 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Last update 30 Apr 10:59 PM PDT
Extended Forecast for

5 Miles WSW Quartz Hill CA

  • Tonight

    Tonight: Clear, with a low around 47. West southwest wind around 10 mph, with gusts as high as 15 mph.

    Low: 47 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 78. West wind 5 to 15 mph becoming northeast in the morning. Winds could gust as high as 20 mph.

    High: 78 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 47. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 47 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 76. Breezy, with a south southwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 76 °F

    Sunny then
    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 43. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 43 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 65. Breezy.

    High: 65 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 44. Breezy.

    Low: 44 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Monday

    Monday: Mostly sunny, with a high near 58. Breezy.

    High: 58 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 44. Breezy.

    Low: 44 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

Detailed Forecast

Tonight
Clear, with a low around 47. West southwest wind around 10 mph, with gusts as high as 15 mph.
Friday
Sunny, with a high near 78. West wind 5 to 15 mph becoming northeast in the morning. Winds could gust as high as 20 mph.
Friday Night
Mostly clear, with a low around 47. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 76. Breezy, with a south southwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
Saturday Night
Mostly clear, with a low around 43. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday
Sunny, with a high near 65. Breezy.
Sunday Night
Mostly clear, with a low around 44. Breezy.
Monday
Mostly sunny, with a high near 58. Breezy.
Monday Night
Partly cloudy, with a low around 44. Breezy.
Tuesday
Mostly sunny, with a high near 60.
Tuesday Night
Mostly clear, with a low around 46.
Wednesday
Sunny, with a high near 72.
Wednesday Night
Mostly clear, with a low around 52.
Thursday
Sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Quartz Hill CA
 34.62°N 118.28°W (Elev. 3340 ft)
Last Update:
8:51 pm PDT Apr 30, 2026
Forecast Valid:
11pm PDT Apr 30, 2026-6pm PDT May 7, 2026
 
Forecast Discussion
 
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