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

31°F

-1°C

Humidity 62%
Wind Speed NNE 5 MPH
Barometer NA
Dewpoint 19°F (-7°C)
Visibility NA
Wind Chill26°F (-3°C)
Last update 21 Feb 03:59 AM PST
Extended Forecast for

11 Miles WSW Quartz Hill CA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 52. Northeast wind around 15 mph, with gusts as high as 25 mph.

    High: 52 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 37. Wind chill values as low as 30. Northeast wind around 15 mph, with gusts as high as 20 mph.

    Low: 37 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 58. Wind chill values as low as 30 early. Breezy, with a northeast wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 58 °F

    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42. North northeast wind around 15 mph, with gusts as high as 20 mph.

    Low: 42 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 64. Breezy, with a northeast wind 10 to 20 mph, with gusts as high as 25 mph.

    High: 64 °F

    Mostly Sunny
    and Breezy
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 70.

    High: 70 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 52. Northeast wind around 15 mph, with gusts as high as 25 mph.
Tonight
Partly cloudy, with a low around 37. Wind chill values as low as 30. Northeast wind around 15 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 58. Wind chill values as low as 30 early. Breezy, with a northeast wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Mostly clear, with a low around 42. North northeast wind around 15 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 64. Breezy, with a northeast wind 10 to 20 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 48.
Tuesday
Sunny, with a high near 70.
Tuesday Night
Partly cloudy, with a low around 50.
Wednesday
Sunny, with a high near 68.
Wednesday Night
Partly cloudy, with a low around 50.
Thursday
Mostly sunny, with a high near 70.
Thursday Night
Partly cloudy, with a low around 51.
Friday
Mostly sunny, with a high near 72.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles WSW Quartz Hill CA
 34.63°N 118.39°W (Elev. 3228 ft)
Last Update:
1:07 pm PST Feb 21, 2026
Forecast Valid:
4pm PST Feb 21, 2026-6pm PST Feb 27, 2026
 
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