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

45°F

7°C

Humidity 77%
Wind Speed S 10 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Wind Chill40°F (4°C)
Last update 19 Nov 03:59 PM PST
Extended Forecast for

11 Miles WSW Quartz Hill CA

Winter Storm Watch November 20, 01:00pm until November 22, 10:00am
Click here for hazard details and duration
Winter Storm Watch

  • Tonight

    Tonight: Mostly cloudy, with a low around 36. South southwest wind 5 to 10 mph.

    Low: 36 °F

    Mostly Cloudy

  • Thursday

    Thursday: Rain likely, mainly after 4pm. Cloudy, with a high near 46. Wind chill values as low as 30 early. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    High: 46 °F

    Rain Likely

  • Thursday Night

    Thursday Night: Rain likely before 10pm, then showers likely after 10pm. Cloudy, with a low around 39. Southwest wind 10 to 15 mph becoming north after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 39 °F

    Rain Likely

  • Friday

    Friday: Showers likely, mainly before 10am. Mostly cloudy, with a high near 47. Breezy, with a northeast wind around 25 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 47 °F

    Showers
    Likely and
    Breezy

  • Friday Night

    Friday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 40. Windy, with a north northeast wind 25 to 30 mph, with gusts as high as 40 mph.

    Low: 40 °F

    Slight Chance
    Showers and
    Windy

  • Saturday

    Saturday: Mostly sunny, with a high near 55. Breezy.

    High: 55 °F

    Mostly Sunny
    and Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 42.

    Low: 42 °F

    Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 36. South southwest wind 5 to 10 mph.
Thursday
Rain likely, mainly after 4pm. Cloudy, with a high near 46. Wind chill values as low as 30 early. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Rain likely before 10pm, then showers likely after 10pm. Cloudy, with a low around 39. Southwest wind 10 to 15 mph becoming north after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Showers likely, mainly before 10am. Mostly cloudy, with a high near 47. Breezy, with a northeast wind around 25 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 40. Windy, with a north northeast wind 25 to 30 mph, with gusts as high as 40 mph.
Saturday
Mostly sunny, with a high near 55. Breezy.
Saturday Night
Mostly clear, with a low around 42.
Sunday
Sunny, with a high near 59.
Sunday Night
Clear, with a low around 42.
Monday
Sunny, with a high near 61.
Monday Night
Mostly clear, with a low around 43.
Tuesday
Mostly sunny, with a high near 60.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
Sunny, with a high near 57.
Basemap Options
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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:
1:07 pm PST Nov 19, 2025
Forecast Valid:
5pm PST Nov 19, 2025-6pm PST Nov 26, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation