National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

GRASS MOUNTAIN (GMTC1)

Lat: 34.64078°NLon: 118.41435°WElev: 4626.0ft.

NA

57°F

14°C

Humidity 31%
Wind Speed NE 5 MPH
Barometer NA
Dewpoint 26°F (-3°C)
Visibility NA
Last update 12 Nov 12:59 AM PST
Extended Forecast for

11 Miles W Quartz Hill CA

  • Overnight

    Overnight: Clear, with a low around 53. North northeast wind around 5 mph.

    Low: 53 °F

    Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 66. East southeast wind around 5 mph.

    High: 66 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 49. Southwest wind around 5 mph becoming calm.

    Low: 49 °F

    Mostly Cloudy

  • Friday

    Friday: A 40 percent chance of rain. Partly sunny, with a high near 59. South southwest wind 5 to 15 mph, with gusts as high as 20 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 59 °F

    Chance Rain

  • Friday Night

    Friday Night: Rain likely, mainly before 4am. Mostly cloudy, with a low around 45. Windy, with a southwest wind 20 to 25 mph increasing to 25 to 30 mph after midnight. Winds could gust 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

    Rain Likely
    and Windy

  • Saturday

    Saturday: A 20 percent chance of rain before 10am. Mostly sunny, with a high near 54.

    High: 54 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of rain, mainly after 4am. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Chance Rain

Detailed Forecast

Overnight
Clear, with a low around 53. North northeast wind around 5 mph.
Thursday
Increasing clouds, with a high near 66. East southeast wind around 5 mph.
Thursday Night
Mostly cloudy, with a low around 49. Southwest wind around 5 mph becoming calm.
Friday
A 40 percent chance of rain. Partly sunny, with a high near 59. South southwest wind 5 to 15 mph, with gusts as high as 20 mph. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Rain likely, mainly before 4am. Mostly cloudy, with a low around 45. Windy, with a southwest wind 20 to 25 mph increasing to 25 to 30 mph after midnight. Winds could gust as high as 45 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
A 20 percent chance of rain before 10am. Mostly sunny, with a high near 54.
Saturday Night
Partly cloudy, with a low around 43.
Sunday
Mostly sunny, with a high near 55.
Sunday Night
A chance of rain, mainly after 4am. Mostly cloudy, with a low around 44.
Monday
Rain likely, mainly after 10am. Mostly cloudy, with a high near 50.
Monday Night
Rain likely. Mostly cloudy, with a low around 38. Breezy.
Tuesday
Mostly sunny, with a high near 48. Breezy.
Tuesday Night
Mostly clear, with a low around 35.
Wednesday
A chance of rain. Mostly sunny, with a high near 51.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
11 Miles W Quartz Hill CA
 34.65°N 118.43°W (Elev. 3832 ft)
Last Update:
10:16 pm PST Nov 11, 2026
Forecast Valid:
1am PST Nov 12, 2026-6pm PST Nov 18, 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