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

62°F

17°C

Humidity 45%
Wind Speed E 6 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Last update 10 Oct 10:59 PM PDT
Extended Forecast for

14 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

  • Tonight

    Tonight: Showers likely. Cloudy, with a low around 56. West southwest wind around 10 mph becoming north northwest after midnight. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 56 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers, mainly before 11am. High near 64. Windy, with a north wind 10 to 20 mph becoming south southwest 20 to 30 mph in the morning. Winds could gust as high as 45 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 64 °F

    Showers and
    Breezy then
    Chance
    Showers and
    Windy

  • Sunday Night

    Sunday Night: Showers likely, mainly after 11pm. Mostly cloudy, with a low around 46. 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. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 46 °F

    Showers
    Likely and
    Windy

  • Columbus Day

    Columbus Day: Showers likely. Partly sunny, with a high near 54. Breezy, with a 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: 54 °F

    Showers
    Likely and
    Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 43. Breezy, with a southwest wind 15 to 20 mph becoming west northwest after midnight. Winds could gust as high as 30 mph.

    Low: 43 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 45.

    Low: 45 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 48.

    Low: 48 °F

    Clear

Detailed Forecast

Tonight
Showers likely. Cloudy, with a low around 56. West southwest wind around 10 mph becoming north northwest after midnight. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Showers, mainly before 11am. High near 64. Windy, with a north wind 10 to 20 mph becoming south southwest 20 to 30 mph in the morning. Winds could gust as high as 45 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 46. 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. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Columbus Day
Showers likely. Partly sunny, with a high near 54. Breezy, with a 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
Mostly clear, with a low around 43. Breezy, with a southwest wind 15 to 20 mph becoming west northwest after midnight. Winds could gust as high as 30 mph.
Tuesday
Sunny, with a high near 62.
Tuesday Night
Clear, with a low around 45.
Wednesday
Sunny, with a high near 69.
Wednesday Night
Clear, with a low around 48.
Thursday
Sunny, with a high near 72. Windy.
Thursday Night
Clear, with a low around 53. Windy.
Friday
Sunny, with a high near 74. Windy.
Friday Night
Clear, with a low around 54. Windy.
Saturday
Sunny, with a high near 75. Windy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
14 Miles W Quartz Hill CA
 34.69°N 118.46°W (Elev. 3550 ft)
Last Update:
11:16 pm PDT Oct 10, 2026
Forecast Valid:
11pm PDT Oct 10, 2026-6pm PDT Oct 17, 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