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

63°F

17°C

Humidity 34%
Wind Speed W 2 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Last update 18 Oct 08:59 PM PDT
Extended Forecast for

7 Miles WSW Quartz Hill CA

  • Tonight

    Tonight: Clear, with a low around 58. South southeast wind around 5 mph becoming north northwest after midnight.

    Low: 58 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 70. North northeast wind 5 to 10 mph becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 70 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 53. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 53 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 64. South wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 64 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 50. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 50 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Showers likely, mainly after 11am. Partly sunny, with a high near 58. Chance of precipitation is 60%.

    High: 58 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 46. Chance of precipitation is 80%.

    Low: 46 °F

    Showers

  • Thursday

    Thursday: Showers likely. Mostly cloudy, with a high near 54.

    High: 54 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A slight chance of showers before 11pm. Mostly clear, with a low around 44.

    Low: 44 °F

    Slight Chance
    Showers then
    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 58. South southeast wind around 5 mph becoming north northwest after midnight.
Monday
Sunny, with a high near 70. North northeast wind 5 to 10 mph becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Monday Night
Clear, with a low around 53. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 64. South wind 5 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Partly cloudy, with a low around 50. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday
Showers likely, mainly after 11am. Partly sunny, with a high near 58. Chance of precipitation is 60%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 46. Chance of precipitation is 80%.
Thursday
Showers likely. Mostly cloudy, with a high near 54.
Thursday Night
A slight chance of showers before 11pm. Mostly clear, with a low around 44.
Friday
Sunny, with a high near 58.
Friday Night
Clear, with a low around 45.
Saturday
Sunny, with a high near 61.
Saturday Night
Mostly clear, with a low around 48.
Sunday
Mostly sunny, with a high near 59.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles WSW Quartz Hill CA
 34.59°N 118.3°W (Elev. 4199 ft)
Last Update:
11:26 am PDT Oct 18, 2026
Forecast Valid:
9pm PDT Oct 18, 2026-6pm PDT Oct 25, 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