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

86°F

30°C

Humidity 21%
Wind Speed NE 3 MPH
Barometer NA
Dewpoint 42°F (6°C)
Visibility NA
Heat Index83°F (28°C)
Last update 07 Oct 01:59 PM PDT
Extended Forecast for

11 Miles WSW Quartz Hill CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 90. East wind around 10 mph.

    High: 90 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 65. South southwest wind 5 to 10 mph becoming northwest after midnight.

    Low: 65 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 90. North wind 10 to 15 mph becoming south southwest in the afternoon. Winds could gust as high as 20 mph.

    High: 90 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 64. West southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 64 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 85. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 85 °F

    Sunny then
    Sunny and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 73. Breezy.

    High: 73 °F

    Mostly Sunny
    and Breezy

  • Saturday Night

    Saturday Night: A chance of showers after 11pm. Partly cloudy, with a low around 51. Breezy.

    Low: 51 °F

    Chance
    Showers and
    Breezy

  • Sunday

    Sunday: A chance of showers. Partly sunny, with a high near 65. Breezy.

    High: 65 °F

    Chance
    Showers and
    Breezy

Detailed Forecast

This Afternoon
Sunny, with a high near 90. East wind around 10 mph.
Tonight
Clear, with a low around 65. South southwest wind 5 to 10 mph becoming northwest after midnight.
Thursday
Sunny, with a high near 90. North wind 10 to 15 mph becoming south southwest in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Mostly clear, with a low around 64. West southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 85. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Friday Night
Mostly clear, with a low around 56.
Saturday
Mostly sunny, with a high near 73. Breezy.
Saturday Night
A chance of showers after 11pm. Partly cloudy, with a low around 51. Breezy.
Sunday
A chance of showers. Partly sunny, with a high near 65. Breezy.
Sunday Night
Showers likely, mainly after 11pm. Mostly cloudy, with a low around 43. Breezy.
Columbus Day
Showers likely. Mostly cloudy, with a high near 57. Breezy.
Monday Night
A chance of showers. Mostly cloudy, with a low around 41.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 62.
Basemap Options
Click map to change the forecast location
Loading map...
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:
1:57 pm PDT Oct 7, 2026
Forecast Valid:
3pm PDT Oct 7, 2026-6pm PDT Oct 13, 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