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

62°F

17°C

Humidity 36%
Wind Speed SSW 5 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Last update 18 Oct 07:59 PM PDT
Extended Forecast for

11 Miles W Quartz Hill CA

  • Tonight

    Tonight: Clear, with a low around 53. North northwest wind around 5 mph.

    Low: 53 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 73. North wind 5 to 15 mph becoming south in the morning. Winds could gust as high as 25 mph.

    High: 73 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 50. Southwest wind around 10 mph, with gusts as high as 15 mph.

    Low: 50 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 67. South wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 67 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 48. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 48 °F

    Partly Cloudy

  • Wednesday

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

    High: 58 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm before 11pm, then showers likely. Low around 45. Chance of precipitation is 80%.

    Low: 45 °F

    Showers

  • Thursday

    Thursday: Showers likely, mainly after 11am. Mostly cloudy, with a high near 55.

    High: 55 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A slight chance of showers before 11pm. Mostly clear, with a low around 42.

    Low: 42 °F

    Slight Chance
    Showers then
    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 53. North northwest wind around 5 mph.
Monday
Sunny, with a high near 73. North wind 5 to 15 mph becoming south in the morning. Winds could gust as high as 25 mph.
Monday Night
Clear, with a low around 50. Southwest wind around 10 mph, with gusts as high as 15 mph.
Tuesday
Sunny, with a high near 67. South wind 5 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Partly cloudy, with a low around 48. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Wednesday
Showers likely, mainly after 11am. Mostly cloudy, with a high near 58. Chance of precipitation is 60%.
Wednesday Night
Showers and possibly a thunderstorm before 11pm, then showers likely. Low around 45. Chance of precipitation is 80%.
Thursday
Showers likely, mainly after 11am. Mostly cloudy, with a high near 55.
Thursday Night
A slight chance of showers before 11pm. Mostly clear, with a low around 42.
Friday
Sunny, with a high near 59.
Friday Night
Clear, with a low around 43.
Saturday
Sunny, with a high near 62.
Saturday Night
Mostly clear, with a low around 46.
Sunday
Mostly sunny, with a high near 60.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles W Quartz Hill CA
 34.65°N 118.43°W (Elev. 3832 ft)
Last Update:
11:26 am PDT Oct 18, 2026
Forecast Valid:
8pm PDT Oct 18, 2026-6pm PDT Oct 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation