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

67°F

19°C

Humidity 82%
Wind Speed S 8 MPH
Barometer NA
Dewpoint 61°F (16°C)
Visibility NA
Last update 19 Sep 11:59 AM PDT
Extended Forecast for

11 Miles WSW Quartz Hill CA

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 74. South southwest wind 10 to 15 mph, with gusts as high as 20 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 74 °F

    Chance
    Showers

  • Tonight

    Tonight: Mostly clear, with a low around 56. West southwest wind 5 to 10 mph.

    Low: 56 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 78. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 57. Southwest wind 5 to 10 mph becoming northwest after midnight. Winds could gust as high as 15 mph.

    Low: 57 °F

    Clear

  • Sunday

    Sunday: A 20 percent chance of showers after 11am. Mostly sunny, with a high near 76. North northwest wind 10 to 15 mph becoming west southwest in the morning. Winds could gust as high as 20 mph.

    High: 76 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 79.

    High: 79 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers. Partly cloudy, with a low around 60.

    Low: 60 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Partly sunny, with a high near 79.

    High: 79 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 74. South southwest wind 10 to 15 mph, with gusts as high as 20 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Mostly clear, with a low around 56. West southwest wind 5 to 10 mph.
Saturday
Sunny, with a high near 78. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Clear, with a low around 57. Southwest wind 5 to 10 mph becoming northwest after midnight. Winds could gust as high as 15 mph.
Sunday
A 20 percent chance of showers after 11am. Mostly sunny, with a high near 76. North northwest wind 10 to 15 mph becoming west southwest in the morning. Winds could gust as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 56.
Monday
A 30 percent chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 79.
Monday Night
A chance of showers and thunderstorms before 11pm, then a slight chance of showers. Partly cloudy, with a low around 60.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 79.
Tuesday Night
A slight chance of showers and thunderstorms before 11pm. Partly cloudy, with a low around 58.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Clear, with a low around 58.
Thursday
Sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles WSW Quartz Hill CA
 34.63°N 118.39°W (Elev. 3228 ft)
Last Update:
5:23 am PDT Sep 19, 2025
Forecast Valid:
12pm PDT Sep 19, 2025-6pm PDT Sep 25, 2025
 
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