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 SW 12 MPH
Barometer NA
Dewpoint 41°F (5°C)
Visibility NA
Wind Chill35°F (2°C)
Last update 26 Dec 01:59 PM PST
Extended Forecast for

11 Miles W Quartz Hill CA

Flood Watch December 26, 02:59pm until December 26, 06:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch December 26, 02:59pm until December 26, 06:00pm

    NOW until 6:00pm Fri

    Flood Watch

  • This Afternoon

    High: 49 °F

    Showers
    Likely

  • Tonight

    Tonight: Showers likely before 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 37. Wind chill values as low as 30. West wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 37 °F

    Showers
    Likely then
    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 46. Wind chill values as low as 30 early. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 46 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 34. Wind chill values as low as 25. North wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 34 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 47. Breezy, with a northeast wind 20 to 25 mph, with gusts as high as 40 mph.

    High: 47 °F

    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 34. Windy.

    Low: 34 °F

    Mostly Clear
    and Windy

  • Monday

    Monday: Sunny, with a high near 48. Windy.

    High: 48 °F

    Sunny and
    Windy

  • Monday Night

    Monday Night: Mostly clear, with a low around 37. Breezy.

    Low: 37 °F

    Mostly Clear
    and Breezy

Detailed Forecast

This Afternoon
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 49. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers likely before 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 37. Wind chill values as low as 30. West wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Saturday
Sunny, with a high near 46. Wind chill values as low as 30 early. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Saturday Night
Mostly clear, with a low around 34. Wind chill values as low as 25. North wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 47. Breezy, with a northeast wind 20 to 25 mph, with gusts as high as 40 mph.
Sunday Night
Mostly clear, with a low around 34. Windy.
Monday
Sunny, with a high near 48. Windy.
Monday Night
Mostly clear, with a low around 37. Breezy.
Tuesday
Sunny, with a high near 51. Breezy.
Tuesday Night
A slight chance of showers after 4am. Mostly cloudy, with a low around 40. Breezy.
Wednesday
A chance of showers. Mostly cloudy, with a high near 50.
Wednesday Night
Showers likely. Mostly cloudy, with a low around 42.
New Year's Day
Showers likely. Mostly cloudy, with a high near 48.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
11 Miles W Quartz Hill CA
 34.67°N 118.4°W (Elev. 3599 ft)
Last Update:
1:46 pm PST Dec 26, 2025
Forecast Valid:
2pm PST Dec 26, 2025-6pm PST Jan 1, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation