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

39°F

4°C

Humidity 65%
Wind Speed E 7 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Wind Chill34°F (1°C)
Last update 28 Dec 06:59 PM PST
Extended Forecast for

7 Miles WSW Quartz Hill CA

Wind Advisory December 28, 07:52pm until December 28, 10:00pm
High Wind Warning December 28, 10:00pm until December 29, 03:00pm
Click here for hazard details and duration
...
High Wind Warning
  •  
    Wind Advisory December 28, 07:52pm until December 28, 10:00pm

    NOW until 10:00pm Sun

    Wind Advisory

  • Tonight

    Low: 36 °F

    Partly Cloudy
    and Windy

  • Monday

    Monday: Sunny, with a high near 50. Wind chill values as low as 25 early. Windy, with a northeast wind around 30 mph, with gusts as high as 45 mph.

    High: 50 °F

    Sunny and
    Windy

  • Monday Night

    Monday Night: Mostly clear, with a low around 41. Wind chill values as low as 30. Windy, with a northeast wind around 30 mph, with gusts as high as 45 mph.

    Low: 41 °F

    Mostly Clear
    and Windy

  • Tuesday

    Tuesday: Partly sunny, with a high near 51. Wind chill values as low as 30 early. Breezy, with a northeast wind around 25 mph, with gusts as high as 40 mph.

    High: 51 °F

    Partly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: A 10 percent chance of showers after 4am. Mostly cloudy, with a low around 43. Breezy, with a northeast wind around 20 mph, with gusts as high as 35 mph.

    Low: 43 °F

    Breezy.
    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Showers likely, mainly after 4pm. Mostly cloudy, with a high near 49. Chance of precipitation is 60%.

    High: 49 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers. Low around 45. Chance of precipitation is 80%.

    Low: 45 °F

    Showers

  • New Year's Day

    New Year's Day: Showers. Mostly cloudy, with a high near 50.

    High: 50 °F

    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 36. Wind chill values as low as 25. Windy, with a northeast wind around 30 mph, with gusts as high as 45 mph.
Monday
Sunny, with a high near 50. Wind chill values as low as 25 early. Windy, with a northeast wind around 30 mph, with gusts as high as 45 mph.
Monday Night
Mostly clear, with a low around 41. Wind chill values as low as 30. Windy, with a northeast wind around 30 mph, with gusts as high as 45 mph.
Tuesday
Partly sunny, with a high near 51. Wind chill values as low as 30 early. Breezy, with a northeast wind around 25 mph, with gusts as high as 40 mph.
Tuesday Night
A 10 percent chance of showers after 4am. Mostly cloudy, with a low around 43. Breezy, with a northeast wind around 20 mph, with gusts as high as 35 mph.
Wednesday
Showers likely, mainly after 4pm. Mostly cloudy, with a high near 49. Chance of precipitation is 60%.
Wednesday Night
Showers. Low around 45. Chance of precipitation is 80%.
New Year's Day
Showers. Mostly cloudy, with a high near 50.
Thursday Night
Showers likely, mainly before 10pm. Mostly cloudy, with a low around 47.
Friday
Showers likely, mainly after 10am. Mostly cloudy, with a high near 50.
Friday Night
Showers likely. Mostly cloudy, with a low around 47.
Saturday
Showers likely. Partly sunny, with a high near 49.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 44.
Sunday
A chance of showers. Partly sunny, with a high near 48.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
7 Miles WSW Quartz Hill CA
 34.59°N 118.3°W (Elev. 4199 ft)
Last Update:
7:31 pm PST Dec 28, 2025
Forecast Valid:
7pm PST Dec 28, 2025-6pm PST Jan 4, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation