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

70°F

21°C

Humidity 21%
Wind Speed SSW 16 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Last update 12 Jul 07:59 AM PDT
Extended Forecast for

9 Miles W Quartz Hill CA

Extreme Heat Watch July 14, 10:00am until July 16, 08:00pm
Click here for hazard details and duration
Extreme Heat Watch

  • Today

    Today: Partly sunny, with a high near 91. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 91 °F

    Partly Sunny
    then Partly
    Sunny and
    Breezy

  • Tonight

    Tonight: Partly cloudy, with a low around 71. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 71 °F

    Partly Cloudy

  • Monday

    Monday: A 10 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 91 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 71. West wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 71 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 95. West southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 95 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 73. Breezy.

    Low: 73 °F

    Mostly Clear
    then Mostly
    Clear and
    Breezy

  • Wednesday

    Wednesday: Sunny and hot, with a high near 99.

    High: 99 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 92. Breezy.

    High: 92 °F

    Sunny then
    Sunny and
    Breezy

Detailed Forecast

Today
Partly sunny, with a high near 91. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Tonight
Partly cloudy, with a low around 71. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Monday
A 10 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 71. West wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday
Sunny, with a high near 95. West southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 73. Breezy.
Wednesday
Sunny and hot, with a high near 99.
Wednesday Night
Mostly clear, with a low around 74.
Thursday
Sunny, with a high near 92. Breezy.
Thursday Night
Mostly clear, with a low around 70. Breezy.
Friday
A slight chance of showers. Mostly sunny, with a high near 85. Breezy.
Friday Night
Partly cloudy, with a low around 67. Breezy.
Saturday
Sunny, with a high near 84. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
9 Miles W Quartz Hill CA
 34.65°N 118.37°W (Elev. 3396 ft)
Last Update:
5:37 am PDT Jul 12, 2026
Forecast Valid:
9am PDT Jul 12, 2026-6pm PDT Jul 18, 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