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

60°F

16°C

Humidity 36%
Wind Speed SW 21 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Last update 10 Oct 08:59 AM PDT
Extended Forecast for

12 Miles W Quartz Hill CA

  • Today

    Today: Mostly cloudy, with a high near 75. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 75 °F

    Mostly Cloudy
    and Breezy

  • Tonight

    Tonight: Showers likely, mainly after 11pm. Cloudy, with a low around 58. Southwest wind 10 to 15 mph becoming northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 58 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers, mainly before 11am. High near 64. Windy, with a north northwest wind 15 to 20 mph becoming south southwest 25 to 30 mph in the morning. Winds could gust as high as 45 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 64 °F

    Windy.
    Showers then
    Chance
    Showers

  • Sunday Night

    Sunday Night: Showers likely, mainly after 11pm. Mostly cloudy, with a low around 46. Windy, with a south southwest wind 25 to 30 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 46 °F

    Showers
    Likely and
    Windy

  • Columbus Day

    Columbus Day: Showers likely. Mostly cloudy, with a high near 54. South southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 54 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 20 percent chance of showers before 11pm. Partly cloudy, with a low around 39.

    Low: 39 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 75. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Tonight
Showers likely, mainly after 11pm. Cloudy, with a low around 58. Southwest wind 10 to 15 mph becoming northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Showers, mainly before 11am. High near 64. Windy, with a north northwest wind 15 to 20 mph becoming south southwest 25 to 30 mph in the morning. Winds could gust as high as 45 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Showers likely, mainly after 11pm. Mostly cloudy, with a low around 46. Windy, with a south southwest wind 25 to 30 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Columbus Day
Showers likely. Mostly cloudy, with a high near 54. South southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
A 20 percent chance of showers before 11pm. Partly cloudy, with a low around 39.
Tuesday
Sunny, with a high near 62.
Tuesday Night
Mostly clear, with a low around 42.
Wednesday
Sunny, with a high near 69.
Wednesday Night
Clear, with a low around 47. Breezy.
Thursday
Sunny, with a high near 73. Windy.
Thursday Night
Clear, with a low around 52. Windy.
Friday
Sunny, with a high near 75. Windy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
12 Miles W Quartz Hill CA
 34.67°N 118.43°W (Elev. 3396 ft)
Last Update:
2:41 am PDT Oct 10, 2026
Forecast Valid:
9am PDT Oct 10, 2026-6pm PDT Oct 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation