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

46°F

8°C

Humidity 97%
Wind Speed SSW 9 MPH
Barometer NA
Dewpoint 45°F (7°C)
Visibility NA
Wind Chill41°F (5°C)
Last update 03 Jan 05:59 PM PST
Extended Forecast for

11 Miles W Quartz Hill CA

Wind Advisory until January 3, 10:00pm
Flood Advisory until January 3, 10:00pm
Click here for hazard details and duration
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  •  
    Wind Advisory until January 3, 10:00pm
    Flood Advisory until January 3, 10:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Tonight

    Low: 45 °F

    Rain Likely
    and Breezy

  • Sunday

    Sunday: Rain, mainly after 10am. High near 48. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 48 °F

    Rain and
    Breezy

  • Sunday Night

    Sunday Night: Rain, mainly before 10pm. Low around 41. Breezy, with a southwest wind 20 to 25 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 41 °F

    Breezy. Rain
    then Chance
    Rain

  • Monday

    Monday: A 20 percent chance of rain after 10am. Mostly cloudy, with a high near 48. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 48 °F

    Slight Chance
    Rain

  • Monday Night

    Monday Night: A 30 percent chance of rain, mainly after 10pm. Mostly cloudy, with a low around 39. South southwest wind 5 to 10 mph, with gusts as high as 15 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 39 °F

    Chance Rain

  • Tuesday

    Tuesday: A 30 percent chance of rain. Partly sunny, with a high near 49.

    High: 49 °F

    Chance Rain

  • Tuesday Night

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

    Low: 37 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of rain after 10am. Mostly sunny, with a high near 49.

    High: 49 °F

    Slight Chance
    Rain

Detailed Forecast

Tonight
Rain likely, mainly before 10pm. Mostly cloudy, with a low around 45. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Rain, mainly after 10am. High near 48. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Rain, mainly before 10pm. Low around 41. Breezy, with a southwest wind 20 to 25 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Monday
A 20 percent chance of rain after 10am. Mostly cloudy, with a high near 48. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
A 30 percent chance of rain, mainly after 10pm. Mostly cloudy, with a low around 39. South southwest wind 5 to 10 mph, with gusts as high as 15 mph. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
A 30 percent chance of rain. Partly sunny, with a high near 49.
Tuesday Night
Partly cloudy, with a low around 37.
Wednesday
A slight chance of rain after 10am. Mostly sunny, with a high near 49.
Wednesday Night
A slight chance of rain. Partly cloudy, with a low around 34.
Thursday
Mostly sunny, with a high near 44.
Thursday Night
Mostly clear, with a low around 32.
Friday
Sunny, with a high near 45. Breezy.
Friday Night
Clear, with a low around 34.
Saturday
Sunny, with a high near 48. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
11 Miles W Quartz Hill CA
 34.65°N 118.4°W (Elev. 3799 ft)
Last Update:
1:07 pm PST Jan 3, 2026
Forecast Valid:
6pm PST Jan 3, 2026-6pm PST Jan 10, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation