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 41%
Wind Speed W 6 MPH
Barometer NA
Dewpoint 45°F (7°C)
Visibility NA
Last update 29 Jul 09:59 PM PDT
Extended Forecast for

11 Miles WSW Quartz Hill CA

Heat Advisory July 30, 10:00am until July 31, 10:00am
Extreme Heat Warning July 31, 10:00am until August 2, 08:00pm
Click here for hazard details and duration
Heat Advisory
Extreme Heat Warning

  • Tonight

    Tonight: Clear, with a low around 60. West wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 60 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 91. West northwest wind 10 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph.

    High: 91 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 63. Southwest wind 10 to 15 mph becoming west northwest in the evening. Winds could gust as high as 25 mph.

    Low: 63 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 96. Northwest wind 5 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.

    High: 96 °F

    Hot

  • Friday Night

    Friday Night: Clear, with a low around 67. West northwest wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 67 °F

    Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

  • Saturday Night

    Saturday Night: Clear, with a low around 65.

    Low: 65 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 63.

    Low: 63 °F

    Clear

Detailed Forecast

Tonight
Clear, with a low around 60. West wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 91. West northwest wind 10 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph.
Thursday Night
Clear, with a low around 63. Southwest wind 10 to 15 mph becoming west northwest in the evening. Winds could gust as high as 25 mph.
Friday
Sunny and hot, with a high near 96. Northwest wind 5 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Clear, with a low around 67. West northwest wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday
Sunny and hot, with a high near 97.
Saturday Night
Clear, with a low around 65.
Sunday
Sunny, with a high near 93.
Sunday Night
Clear, with a low around 63.
Monday
Sunny, with a high near 91. Breezy.
Monday Night
Clear, with a low around 63. Breezy.
Tuesday
Sunny, with a high near 92.
Tuesday Night
Clear, with a low around 63.
Wednesday
Sunny, with a high near 91.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
11 Miles WSW Quartz Hill CA
 34.63°N 118.39°W (Elev. 3228 ft)
Last Update:
1:22 pm PDT Jul 29, 2026
Forecast Valid:
10pm PDT Jul 29, 2026-6pm PDT Aug 5, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation