National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

GRASS MOUNTAIN (GMTC1)

Lat: 34.64078°NLon: 118.41435°WElev: 4626.0ft.

NA

58°F

14°C

Humidity 71%
Wind Speed SSW 17 MPH
Barometer NA
Dewpoint 49°F (9°C)
Visibility NA
Last update 11 Oct 05:59 AM PDT
Extended Forecast for

5 Miles WSW Quartz Hill CA

Wind Advisory October 11, 12:00pm until October 12, 10:00am
Click here for hazard details and duration
Wind Advisory

  • Today

    Today: Sunny, with a high near 68. Windy, with a west wind 15 to 20 mph increasing to 25 to 30 mph in the afternoon. Winds could gust as high as 40 mph.

    High: 68 °F

    Sunny and
    Windy

  • Tonight

    Tonight: Clear, with a low around 45. Breezy, with a west northwest wind 20 to 25 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 40 mph.

    Low: 45 °F

    Clear and
    Breezy

  • Sunday

    Sunday: Sunny, with a high near 70. Northeast wind around 15 mph, with gusts as high as 25 mph.

    High: 70 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 47. North northeast wind around 15 mph becoming west southwest after midnight. Winds could gust as high as 25 mph.

    Low: 47 °F

    Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 63. Windy, with a south southwest wind 15 to 20 mph increasing to 25 to 30 mph in the morning. Winds could gust as high as 45 mph.

    High: 63 °F

    Sunny and
    Windy

  • Monday Night

    Monday Night: A 20 percent chance of showers after 11pm. Mostly cloudy, with a low around 48. Windy.

    Low: 48 °F

    Slight Chance
    Showers and
    Windy

  • Tuesday

    Tuesday: Rain likely. Mostly cloudy, with a high near 56. Windy. Chance of precipitation is 70%.

    High: 56 °F

    Rain Likely
    and Windy

  • Tuesday Night

    Tuesday Night: A chance of rain before 11pm, then a chance of showers after 11pm. Mostly cloudy, with a low around 45. Breezy.

    Low: 45 °F

    Chance Rain
    and Breezy

  • Wednesday

    Wednesday: Sunny, with a high near 55.

    High: 55 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 68. Windy, with a west wind 15 to 20 mph increasing to 25 to 30 mph in the afternoon. Winds could gust as high as 40 mph.
Tonight
Clear, with a low around 45. Breezy, with a west northwest wind 20 to 25 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 40 mph.
Sunday
Sunny, with a high near 70. Northeast wind around 15 mph, with gusts as high as 25 mph.
Sunday Night
Clear, with a low around 47. North northeast wind around 15 mph becoming west southwest after midnight. Winds could gust as high as 25 mph.
Columbus Day
Sunny, with a high near 63. Windy, with a south southwest wind 15 to 20 mph increasing to 25 to 30 mph in the morning. Winds could gust as high as 45 mph.
Monday Night
A 20 percent chance of showers after 11pm. Mostly cloudy, with a low around 48. Windy.
Tuesday
Rain likely. Mostly cloudy, with a high near 56. Windy. Chance of precipitation is 70%.
Tuesday Night
A chance of rain before 11pm, then a chance of showers after 11pm. Mostly cloudy, with a low around 45. Breezy.
Wednesday
Sunny, with a high near 55.
Wednesday Night
Mostly clear, with a low around 44.
Thursday
Sunny, with a high near 62.
Thursday Night
Clear, with a low around 46.
Friday
Sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Quartz Hill CA
 34.62°N 118.28°W (Elev. 3340 ft)
Last Update:
5:21 am PDT Oct 11, 2025
Forecast Valid:
6am PDT Oct 11, 2025-6pm PDT Oct 17, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation