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

88°F

31°C

Humidity 7%
Wind Speed SSW 13 MPH
Barometer NA
Dewpoint 17°F (-8°C)
Visibility NA
Heat Index84°F (29°C)
Last update 17 Aug 12:59 PM PDT
Extended Forecast for

5 Miles WSW Quartz Hill CA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 88. Breezy, with a southwest wind around 20 mph, with gusts as high as 30 mph.

    High: 88 °F

    Mostly Sunny
    and Breezy

  • Tonight

    Tonight: Partly cloudy, with a low around 71. Breezy, with a west northwest wind 10 to 20 mph, with gusts as high as 25 mph.

    Low: 71 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 90. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 90 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 71. Breezy, with a west wind 10 to 20 mph, with gusts as high as 30 mph.

    Low: 71 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 92. Breezy, with a southwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 92 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Wednesday Night

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

    Low: 73 °F

    Mostly Clear
    and Breezy
    then Clear

  • Thursday

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

    High: 92 °F

    Sunny then
    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 74. Breezy.

    Low: 74 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Friday

    Friday: Sunny, with a high near 90. Breezy.

    High: 90 °F

    Sunny then
    Sunny and
    Breezy

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 88. Breezy, with a southwest wind around 20 mph, with gusts as high as 30 mph.
Tonight
Partly cloudy, with a low around 71. Breezy, with a west northwest wind 10 to 20 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny, with a high near 90. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Tuesday Night
Mostly clear, with a low around 71. Breezy, with a west wind 10 to 20 mph, with gusts as high as 30 mph.
Wednesday
Sunny, with a high near 92. Breezy, with a southwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
Wednesday Night
Mostly clear, with a low around 73. Breezy.
Thursday
Sunny, with a high near 92. Breezy.
Thursday Night
Mostly clear, with a low around 74. Breezy.
Friday
Sunny, with a high near 90. Breezy.
Friday Night
Mostly clear, with a low around 73. Breezy.
Saturday
Sunny, with a high near 89. Breezy.
Saturday Night
Clear, with a low around 72. Breezy.
Sunday
Sunny, with a high near 87. Breezy.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Quartz Hill CA
 34.62°N 118.31°W (Elev. 3599 ft)
Last Update:
11:26 am PDT Aug 17, 2026
Forecast Valid:
2pm PDT Aug 17, 2026-6pm PDT Aug 23, 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