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

79°F

26°C

Humidity 24%
Wind Speed NNW 3 MPH
Barometer NA
Dewpoint 39°F (4°C)
Visibility NA
Heat Index78°F (26°C)
Last update 25 Aug 09:59 PM PDT
Extended Forecast for

12 Miles W Quartz Hill CA

Extreme Heat Warning August 25, 10:28pm until August 28, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 25, 10:28pm until August 28, 08:00pm

    NOW until 8:00pm Fri

    Extreme Heat Warning

  • Tonight

    Low: 74 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94. Northwest wind 10 to 15 mph becoming west southwest in the afternoon. Winds could gust as high as 25 mph.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 74. West southwest wind around 15 mph becoming northwest after midnight. Winds could gust as high as 25 mph.

    Low: 74 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 92. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 92 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 74. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 74 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Friday

    Friday: Partly sunny, with a high near 91.

    High: 91 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 91. Breezy.

    High: 91 °F

    Sunny then
    Sunny and
    Breezy

Detailed Forecast

Tonight
Mostly clear, with a low around 74. West northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 94. Northwest wind 10 to 15 mph becoming west southwest in the afternoon. Winds could gust as high as 25 mph.
Wednesday Night
Partly cloudy, with a low around 74. West southwest wind around 15 mph becoming northwest after midnight. Winds could gust as high as 25 mph.
Thursday
Mostly sunny, with a high near 92. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday Night
Mostly cloudy, with a low around 74. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Friday
Partly sunny, with a high near 91.
Friday Night
Partly cloudy, with a low around 69.
Saturday
Sunny, with a high near 91. Breezy.
Saturday Night
Clear, with a low around 66. Breezy.
Sunday
Sunny, with a high near 88. Breezy.
Sunday Night
Mostly clear, with a low around 61. Breezy.
Monday
Sunny, with a high near 84. Breezy.
Monday Night
Mostly clear, with a low around 60. Breezy.
Tuesday
A slight chance of showers. Sunny, with a high near 83.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
12 Miles W Quartz Hill CA
 34.67°N 118.43°W (Elev. 3396 ft)
Last Update:
8:41 pm PDT Aug 25, 2026
Forecast Valid:
10pm PDT Aug 25, 2026-6pm PDT Sep 1, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation