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

56°F

13°C

Humidity 39%
Wind Speed N 5 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Last update 15 Mar 02:59 AM PDT
Extended Forecast for

11 Miles WSW Quartz Hill CA

Extreme Heat Watch March 16, 08:00pm until March 20, 08:00pm
Heat Advisory March 16, 10:00am until March 16, 08:00pm
Click here for hazard details and duration
Extreme Heat Watch
Heat Advisory

  • Overnight

    Overnight: Clear, with a low around 51. North northwest wind around 15 mph, with gusts as high as 20 mph.

    Low: 51 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 81. Breezy, with a northeast wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 81 °F

    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 55. North wind around 10 mph, with gusts as high as 15 mph.

    Low: 55 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 85. North northeast wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 85 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 57. Northeast wind 5 to 10 mph becoming north northwest in the evening. Winds could gust as high as 15 mph.

    Low: 57 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 60.

    Low: 60 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 60.

    Low: 60 °F

    Clear

Detailed Forecast

Overnight
Clear, with a low around 51. North northwest wind around 15 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 81. Breezy, with a northeast wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Mostly clear, with a low around 55. North wind around 10 mph, with gusts as high as 15 mph.
Monday
Sunny, with a high near 85. North northeast wind 10 to 15 mph, with gusts as high as 30 mph.
Monday Night
Mostly clear, with a low around 57. Northeast wind 5 to 10 mph becoming north northwest in the evening. Winds could gust as high as 15 mph.
Tuesday
Sunny, with a high near 92.
Tuesday Night
Clear, with a low around 60.
Wednesday
Sunny, with a high near 93.
Wednesday Night
Clear, with a low around 60.
Thursday
Sunny, with a high near 95.
Thursday Night
Clear, with a low around 61.
Friday
Sunny, with a high near 93.
Friday Night
Clear, with a low around 60.
Saturday
Sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
11 Miles WSW Quartz Hill CA
 34.62°N 118.42°W (Elev. 2989 ft)
Last Update:
2:07 am PDT Mar 15, 2026
Forecast Valid:
3am PDT Mar 15, 2026-6pm PDT Mar 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation