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

65°F

18°C

Humidity 62%
Wind Speed SSW 13 MPH
Barometer NA
Dewpoint 52°F (11°C)
Visibility NA
Last update 29 Jun 11:59 AM PDT
Extended Forecast for

5 Miles WSW Quartz Hill CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 75. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 75 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 53. Breezy, with a southwest wind 15 to 25 mph, with gusts as high as 35 mph.

    Low: 53 °F

    Mostly Clear
    and Breezy

  • Tuesday

    Tuesday: Sunny, with a high near 75. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 75 °F

    Sunny then
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 54. Breezy, with a southwest wind 20 to 25 mph, with gusts as high as 35 mph.

    Low: 54 °F

    Mostly Clear
    and Breezy

  • Wednesday

    Wednesday: Sunny, with a high near 74. Breezy, with a southwest wind 15 to 25 mph, with gusts as high as 35 mph.

    High: 74 °F

    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Clear, with a low around 54. Breezy.

    Low: 54 °F

    Clear and
    Breezy then
    Clear

  • Thursday

    Thursday: Sunny, with a high near 76. Breezy.

    High: 76 °F

    Sunny then
    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 57. Breezy.

    Low: 57 °F

    Clear and
    Breezy then
    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 79. Breezy.

    High: 79 °F

    Sunny then
    Sunny and
    Breezy

Detailed Forecast

This Afternoon
Sunny, with a high near 75. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around 53. Breezy, with a southwest wind 15 to 25 mph, with gusts as high as 35 mph.
Tuesday
Sunny, with a high near 75. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Tuesday Night
Mostly clear, with a low around 54. Breezy, with a southwest wind 20 to 25 mph, with gusts as high as 35 mph.
Wednesday
Sunny, with a high near 74. Breezy, with a southwest wind 15 to 25 mph, with gusts as high as 35 mph.
Wednesday Night
Clear, with a low around 54. Breezy.
Thursday
Sunny, with a high near 76. Breezy.
Thursday Night
Mostly clear, with a low around 57. Breezy.
Friday
Sunny, with a high near 79. Breezy.
Friday Night
Mostly clear, with a low around 60. Breezy.
Independence Day
Sunny, with a high near 85.
Saturday Night
Mostly clear, with a low around 65. Breezy.
Sunday
Sunny, with a high near 87.
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 118.28°W (Elev. 3340 ft)
Last Update:
12:07 pm PDT Jun 29, 2026
Forecast Valid:
12pm PDT Jun 29, 2026-6pm PDT Jul 5, 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