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 36%
Wind Speed SSW 23 MPH
Barometer NA
Dewpoint 30°F (-1°C)
Visibility NA
Last update 19 Apr 06:59 PM PDT
Extended Forecast for

11 Miles W Quartz Hill CA

  • Tonight

    Tonight: Mostly clear, with a low around 46. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 46 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 67. Breezy, with a southwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph.

    High: 67 °F

    Sunny and
    Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 45. Breezy, with a southwest wind 15 to 20 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 30 mph.

    Low: 45 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Clear

  • Tuesday

    Tuesday: A chance of showers between 11am and 2pm, then rain likely after 2pm. Mostly sunny, with a high near 56. Breezy, with a south southwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 56 °F

    Rain Likely
    and Breezy

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before 11pm. Partly cloudy, with a low around 39. Breezy, with a southwest wind 15 to 20 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 30 mph.

    Low: 39 °F

    Slight Chance
    Showers and
    Breezy then
    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 46. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 67. Breezy, with a southwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph.
Monday Night
Mostly clear, with a low around 45. Breezy, with a southwest wind 15 to 20 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 30 mph.
Tuesday
A chance of showers between 11am and 2pm, then rain likely after 2pm. Mostly sunny, with a high near 56. Breezy, with a south southwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
A 20 percent chance of showers before 11pm. Partly cloudy, with a low around 39. Breezy, with a southwest wind 15 to 20 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 30 mph.
Wednesday
Mostly sunny, with a high near 57.
Wednesday Night
Mostly clear, with a low around 41.
Thursday
Sunny, with a high near 65.
Thursday Night
Partly cloudy, with a low around 46.
Friday
Mostly sunny, with a high near 65.
Friday Night
Partly cloudy, with a low around 46.
Saturday
Mostly sunny, with a high near 61.
Saturday Night
Partly cloudy, with a low around 46.
Sunday
Mostly sunny, with a high near 58.
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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:
12:41 pm PDT Apr 19, 2026
Forecast Valid:
7pm PDT Apr 19, 2026-6pm PDT Apr 26, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation