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

65°F

18°C

Humidity 46%
Wind Speed SW 11 MPH
Barometer NA
Dewpoint 44°F (7°C)
Visibility NA
Last update 10 Oct 02:59 PM PDT
Extended Forecast for

9 Miles W Quartz Hill CA

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

  • This Afternoon

    This Afternoon: A 20 percent chance of showers. Cloudy, with a high near 74. Breezy, with a southwest wind around 20 mph, with gusts as high as 30 mph.

    High: 74 °F

    Slight Chance
    Showers and
    Breezy

  • Tonight

    Tonight: A slight chance of showers before 11pm, then rain likely after 11pm. Cloudy, with a low around 59. Southwest wind 10 to 15 mph becoming northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 59 °F

    Rain Likely

  • Sunday

    Sunday: Rain, mainly before 11am. High near 63. Windy, with a north wind 15 to 25 mph becoming south southwest 25 to 35 mph in the morning. Winds could gust as high as 50 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 63 °F

    Windy. Rain
    then Chance
    Rain

  • Sunday Night

    Sunday Night: Showers likely, mainly after 11pm. Mostly cloudy, with a low around 48. Windy, with a southwest wind around 30 mph, with gusts as high as 50 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 48 °F

    Showers
    Likely and
    Windy

  • Columbus Day

    Columbus Day: Showers likely. Mostly cloudy, with a high near 53. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 53 °F

    Showers
    Likely and
    Breezy

  • Monday Night

    Monday Night: A 20 percent chance of showers before 11pm. Partly cloudy, with a low around 41.

    Low: 41 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 43.

    Low: 43 °F

    Clear

  • Wednesday

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

    High: 69 °F

    Sunny and
    Breezy

Detailed Forecast

This Afternoon
A 20 percent chance of showers. Cloudy, with a high near 74. Breezy, with a southwest wind around 20 mph, with gusts as high as 30 mph.
Tonight
A slight chance of showers before 11pm, then rain likely after 11pm. Cloudy, with a low around 59. Southwest wind 10 to 15 mph becoming northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Rain, mainly before 11am. High near 63. Windy, with a north wind 15 to 25 mph becoming south southwest 25 to 35 mph in the morning. Winds could gust as high as 50 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Showers likely, mainly after 11pm. Mostly cloudy, with a low around 48. Windy, with a southwest wind around 30 mph, with gusts as high as 50 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Columbus Day
Showers likely. Mostly cloudy, with a high near 53. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
A 20 percent chance of showers before 11pm. Partly cloudy, with a low around 41.
Tuesday
Sunny, with a high near 61.
Tuesday Night
Clear, with a low around 43.
Wednesday
Sunny, with a high near 69. Breezy.
Wednesday Night
Clear, with a low around 48. Breezy.
Thursday
Sunny, with a high near 72. Windy.
Thursday Night
Clear, with a low around 53. Windy.
Friday
Sunny, with a high near 73. Windy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
9 Miles W Quartz Hill CA
 34.65°N 118.37°W (Elev. 3396 ft)
Last Update:
1:57 pm PDT Oct 10, 2026
Forecast Valid:
3pm PDT Oct 10, 2026-6pm PDT Oct 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation