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 40%
Wind Speed ESE 6 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Last update 10 Oct 09:59 PM PDT
Extended Forecast for

11 Miles WSW 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: A slight chance of showers before 11pm, then rain likely after 11pm. Cloudy, with a low around 56. Southwest wind 10 to 15 mph becoming north 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: 56 °F

    Rain Likely

  • Sunday

    Sunday: Rain, mainly before 11am. High near 63. 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: 63 °F

    Windy. Rain
    then Chance
    Rain

  • Sunday Night

    Sunday Night: Showers likely, mainly after 11pm. Mostly cloudy, with a low around 45. Windy, with a south southwest wind 20 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 45 °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 70%. New precipitation amounts between a tenth and quarter 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 39. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 39 °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 42.

    Low: 42 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 47. Breezy.

    Low: 47 °F

    Clear and
    Breezy

Detailed Forecast

Tonight
A slight chance of showers before 11pm, then rain likely after 11pm. Cloudy, with a low around 56. Southwest wind 10 to 15 mph becoming north 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 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 45. Windy, with a south southwest wind 20 to 30 mph, with gusts as high as 45 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 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
A 20 percent chance of showers before 11pm. Partly cloudy, with a low around 39. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Tuesday
Sunny, with a high near 61.
Tuesday Night
Clear, with a low around 42.
Wednesday
Sunny, with a high near 69.
Wednesday Night
Clear, with a low around 47. Breezy.
Thursday
Sunny, with a high near 72. Windy.
Thursday Night
Clear, with a low around 51. Windy.
Friday
Sunny, with a high near 73. Windy.
Friday Night
Clear, with a low around 53. Windy.
Saturday
Sunny, with a high near 75. Breezy.
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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:
1:57 pm PDT Oct 10, 2026
Forecast Valid:
10pm PDT Oct 10, 2026-6pm PDT Oct 17, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation