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

42°F

6°C

Humidity 98%
Wind Speed SSW 32 MPH
Barometer NA
Dewpoint 41°F (5°C)
Visibility NA
Wind Chill31°F (-1°C)
Last update 12 Apr 04:59 AM PDT
Extended Forecast for

7 Miles WSW Quartz Hill CA

Winter Weather Advisory until April 13, 11:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory until April 13, 11:00am

    NOW until 11:00am Mon

    Winter Weather Advisory

  • Today

    High: 49 °F

    Windy. Rain
    then Rain
    Likely

  • Tonight

    Tonight: A 30 percent chance of rain before 11pm. Partly cloudy, with a low around 41. Breezy, with a southwest wind 20 to 25 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 40 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Chance Rain
    and Breezy
    then Partly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 50. Breezy, with a west wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 50 °F

    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 42. Breezy, with a west wind 10 to 20 mph, with gusts as high as 30 mph.

    Low: 42 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 58. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 58 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 44.

    Low: 44 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 48. Breezy.

    Low: 48 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

Detailed Forecast

Today
Rain and possibly a thunderstorm before 11am, then rain likely. High near 49. Windy, with a southwest wind 25 to 30 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Tonight
A 30 percent chance of rain before 11pm. Partly cloudy, with a low around 41. Breezy, with a southwest wind 20 to 25 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 40 mph. New precipitation amounts of less than a tenth of an inch possible.
Monday
Mostly sunny, with a high near 50. Breezy, with a west wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 30 mph.
Monday Night
Mostly clear, with a low around 42. Breezy, with a west wind 10 to 20 mph, with gusts as high as 30 mph.
Tuesday
Sunny, with a high near 58. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Clear, with a low around 44.
Wednesday
Sunny, with a high near 60.
Wednesday Night
Partly cloudy, with a low around 48. Breezy.
Thursday
Mostly sunny, with a high near 58. Breezy.
Thursday Night
Mostly clear, with a low around 44. Breezy.
Friday
Sunny, with a high near 61. Breezy.
Friday Night
Clear, with a low around 47.
Saturday
Sunny, with a high near 66.
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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:
12:52 am PDT Apr 12, 2026
Forecast Valid:
6am PDT Apr 12, 2026-6pm PDT Apr 18, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation