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

Hazardous Weather Conditions

Current conditions at

GRASS MOUNTAIN (GMTC1)

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

NA

46°F

8°C

Humidity 39%
Wind Speed E 5 MPH
Barometer NA
Dewpoint 22°F (-6°C)
Visibility NA
Wind Chill44°F (7°C)
Last update 12 Jan 07:59 PM PST
Extended Forecast for

11 Miles WSW Quartz Hill CA

Wind Advisory January 12, 09:10pm until January 14, 02:00pm
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory January 12, 09:10pm until January 14, 02:00pm

    NOW until 2:00pm Wed

    Wind Advisory

  • Tonight

    Low: 42 °F

    Clear and
    Breezy

  • Tuesday

    Tuesday: Sunny, with a high near 62. Breezy, with a northeast wind 20 to 25 mph, with gusts as high as 35 mph.

    High: 62 °F

    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: Clear, with a low around 45. Breezy, with a north northeast wind around 20 mph, with gusts as high as 30 mph.

    Low: 45 °F

    Clear and
    Breezy

  • Wednesday

    Wednesday: Sunny, with a high near 66. Breezy, with a northeast wind around 20 mph, with gusts as high as 30 mph.

    High: 66 °F

    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Clear, with a low around 45. Breezy, with a northeast wind around 20 mph, with gusts as high as 30 mph.

    Low: 45 °F

    Clear and
    Breezy

  • Thursday

    Thursday: Sunny, with a high near 67. Breezy.

    High: 67 °F

    Sunny and
    Breezy then
    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 44.

    Low: 44 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

Detailed Forecast

Tonight
Clear, with a low around 42. Breezy, with a northeast wind 20 to 25 mph, with gusts as high as 35 mph.
Tuesday
Sunny, with a high near 62. Breezy, with a northeast wind 20 to 25 mph, with gusts as high as 35 mph.
Tuesday Night
Clear, with a low around 45. Breezy, with a north northeast wind around 20 mph, with gusts as high as 30 mph.
Wednesday
Sunny, with a high near 66. Breezy, with a northeast wind around 20 mph, with gusts as high as 30 mph.
Wednesday Night
Clear, with a low around 45. Breezy, with a northeast wind around 20 mph, with gusts as high as 30 mph.
Thursday
Sunny, with a high near 67. Breezy.
Thursday Night
Clear, with a low around 44.
Friday
Sunny, with a high near 66.
Friday Night
Mostly clear, with a low around 45.
Saturday
Sunny, with a high near 66.
Saturday Night
Mostly clear, with a low around 45.
Sunday
Sunny, with a high near 62.
Sunday Night
Mostly clear, with a low around 45.
M.L.King Day
Sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
11 Miles WSW Quartz Hill CA
 34.63°N 118.39°W (Elev. 3228 ft)
Last Update:
1:41 pm PST Jan 12, 2026
Forecast Valid:
9pm PST Jan 12, 2026-6pm PST Jan 19, 2026
 
Forecast Discussion
 
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Additional Resources

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