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

64°F

18°C

Humidity 29%
Wind Speed SSW 5 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Last update 09 Feb 11:59 AM PST
Extended Forecast for

11 Miles WSW Quartz Hill CA

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 66. East wind around 10 mph.

    High: 66 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 48. North northeast wind 5 to 10 mph becoming south after midnight.

    Low: 48 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of rain after 4pm. Mostly cloudy, with a high near 55. Breezy, with a south southwest wind 15 to 20 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 55 °F

    Breezy.
    Mostly Cloudy
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: Rain likely, mainly after 10pm. Mostly cloudy, with a low around 43. Windy, with a south southwest wind 25 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 43 °F

    Rain Likely
    and Windy

  • Wednesday

    Wednesday: A 50 percent chance of rain. Partly sunny, with a high near 51. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 51 °F

    Chance Rain
    and Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 53.

    High: 53 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 66. East wind around 10 mph.
Tonight
Mostly cloudy, with a low around 48. North northeast wind 5 to 10 mph becoming south after midnight.
Tuesday
A 30 percent chance of rain after 4pm. Mostly cloudy, with a high near 55. Breezy, with a south southwest wind 15 to 20 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Rain likely, mainly after 10pm. Mostly cloudy, with a low around 43. Windy, with a south southwest wind 25 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
A 50 percent chance of rain. Partly sunny, with a high near 51. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Partly cloudy, with a low around 36.
Thursday
Mostly sunny, with a high near 53.
Thursday Night
Mostly clear, with a low around 38.
Friday
Sunny, with a high near 57.
Friday Night
Mostly clear, with a low around 39.
Saturday
Mostly sunny, with a high near 56.
Saturday Night
A slight chance of rain. Mostly cloudy, with a low around 39.
Sunday
Rain likely. Mostly cloudy, with a high near 48. 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:
8:14 am PST Feb 9, 2026
Forecast Valid:
12pm PST Feb 9, 2026-6pm PST Feb 15, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation