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

50°F

10°C

Humidity 29%
Wind Speed E 3 MPH
Barometer NA
Dewpoint 19°F (-7°C)
Visibility NA
Last update 21 Jan 09:59 PM PST
Extended Forecast for

7 Miles WSW Quartz Hill CA

  • Tonight

    Tonight: Mostly cloudy, with a low around 47. North wind around 5 mph becoming southwest after midnight.

    Low: 47 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers, mainly after 10am. Cloudy, then gradually becoming mostly sunny, with a high near 53. Southwest wind around 10 mph becoming northwest in the morning. New precipitation amounts of less than a tenth of an inch possible.

    High: 53 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers, mainly before 10pm. Partly cloudy, with a low around 43. West wind around 5 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 43 °F

    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 52. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 52 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 42. Southwest wind around 10 mph, with gusts as high as 15 mph.

    Low: 42 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 53.

    High: 53 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 47. North wind around 5 mph becoming southwest after midnight.
Thursday
A 40 percent chance of showers, mainly after 10am. Cloudy, then gradually becoming mostly sunny, with a high near 53. Southwest wind around 10 mph becoming northwest in the morning. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
A 30 percent chance of showers, mainly before 10pm. Partly cloudy, with a low around 43. West wind around 5 mph. New precipitation amounts of less than a tenth of an inch possible.
Friday
Mostly sunny, with a high near 52. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 42. Southwest wind around 10 mph, with gusts as high as 15 mph.
Saturday
Sunny, with a high near 53.
Saturday Night
Mostly clear, with a low around 38.
Sunday
Mostly sunny, with a high near 49.
Sunday Night
Partly cloudy, with a low around 37.
Monday
Mostly sunny, with a high near 50.
Monday Night
Mostly clear, with a low around 38.
Tuesday
Sunny, with a high near 53.
Tuesday Night
Partly cloudy, with a low around 41.
Wednesday
Partly sunny, with a high near 54.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
7 Miles WSW Quartz Hill CA
 34.59°N 118.3°W (Elev. 4199 ft)
Last Update:
9:21 pm PST Jan 21, 2026
Forecast Valid:
10pm PST Jan 21, 2026-6pm PST Jan 28, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation