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

55°F

13°C

Humidity 77%
Wind Speed SSW 37 MPH
Barometer NA
Dewpoint 48°F (9°C)
Visibility NA
Last update 11 Oct 01:59 PM PDT
Extended Forecast for

9 Miles W Quartz Hill CA

Wind Advisory October 11, 02:32pm until October 12, 05:00am
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory October 11, 02:32pm until October 12, 05:00am

    NOW until 5:00am Mon

    Wind Advisory

  • This Afternoon

    High: 63 °F

    Partly Sunny
    and Windy

  • Tonight

    Tonight: A 50 percent chance of showers, mainly after 11pm. Mostly cloudy, with a low around 47. Windy, with a south southwest wind 25 to 30 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 45 mph. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 47 °F

    Chance
    Showers and
    Windy

  • Columbus Day

    Columbus Day: A 50 percent chance of showers. Mostly cloudy, with a high near 53. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 53 °F

    Chance
    Showers and
    Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 43. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 43 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 62. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 62 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 46.

    Low: 46 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 69. Breezy.

    High: 69 °F

    Sunny and
    Breezy then
    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 49. Breezy.

    Low: 49 °F

    Clear then
    Clear and
    Breezy

Detailed Forecast

This Afternoon
Partly sunny, with a high near 63. Windy, with a south southwest wind around 30 mph, with gusts as high as 45 mph.
Tonight
A 50 percent chance of showers, mainly after 11pm. Mostly cloudy, with a low around 47. Windy, with a south southwest wind 25 to 30 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 45 mph. New precipitation amounts between a tenth and quarter of an inch possible.
Columbus Day
A 50 percent chance of showers. Mostly cloudy, with a high near 53. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Partly cloudy, with a low around 43. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Tuesday
Sunny, with a high near 62. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Clear, with a low around 46.
Wednesday
Sunny, with a high near 69. Breezy.
Wednesday Night
Clear, with a low around 49. Breezy.
Thursday
Sunny, with a high near 72. Windy.
Thursday Night
Clear, with a low around 54. Windy.
Friday
Sunny, with a high near 74. Windy.
Friday Night
Clear, with a low around 55. Windy.
Saturday
Sunny, with a high near 74. Windy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
9 Miles W Quartz Hill CA
 34.65°N 118.37°W (Elev. 3396 ft)
Last Update:
1:41 pm PDT Oct 11, 2026
Forecast Valid:
2pm PDT Oct 11, 2026-6pm PDT Oct 17, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation