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 80%
Wind Speed SSW 18 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Wind Chill39°F (4°C)
Last update 15 Feb 01:59 PM PST
Extended Forecast for

11 Miles W Quartz Hill CA

Winter Storm Watch February 17, 09:00pm until February 19, 09:00am
High Wind Warning February 16, 06:00am until February 16, 06:00pm
Click here for hazard details and duration
Winter Storm Watch
High Wind Warning

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 50. South southwest wind around 15 mph, with gusts as high as 20 mph.

    High: 50 °F

    Mostly Cloudy

  • Tonight

    Tonight: Rain likely, mainly after 4am. Cloudy, with a low around 43. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 43 °F

    Slight Chance
    Rain then
    Rain Likely

  • Washington's Birthday

    Washington's Birthday: Rain. The rain could be heavy at times. High near 44. Wind chill values as low as 30. Breezy, with a south wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New precipitation amounts between 1 and 2 inches possible.

    High: 44 °F

    Heavy Rain
    and Breezy

  • Monday Night

    Monday Night: Rain. Low around 38. Wind chill values as low as 30. Breezy, with a southwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 38 °F

    Rain and
    Breezy

  • Tuesday

    Tuesday: A 40 percent chance of rain. Partly sunny, with a high near 44. Breezy, with a southwest wind 15 to 25 mph, with gusts as high as 40 mph. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 44 °F

    Chance Rain
    and Breezy

  • Tuesday Night

    Tuesday Night: Rain, mainly before 4am. Low around 37. Windy. Chance of precipitation is 100%.

    Low: 37 °F

    Rain and
    Windy

  • Wednesday

    Wednesday: A chance of rain and snow before 7am, then a chance of snow between 7am and 10am, then a slight chance of rain after 10am. Partly sunny, with a high near 40. Breezy. Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 40 °F

    Breezy.
    Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of snow. Mostly cloudy, with a low around 30.

    Low: 30 °F

    Chance Snow

  • Thursday

    Thursday: A chance of snow before 10am, then a chance of rain between 10am and 4pm, then a chance of rain and snow after 4pm. Partly sunny, with a high near 39. Breezy.

    High: 39 °F

    Chance
    Rain/Snow and
    Breezy

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 50. South southwest wind around 15 mph, with gusts as high as 20 mph.
Tonight
Rain likely, mainly after 4am. Cloudy, with a low around 43. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Washington's Birthday
Rain. The rain could be heavy at times. High near 44. Wind chill values as low as 30. Breezy, with a south wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New precipitation amounts between 1 and 2 inches possible.
Monday Night
Rain. Low around 38. Wind chill values as low as 30. Breezy, with a southwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
A 40 percent chance of rain. Partly sunny, with a high near 44. Breezy, with a southwest wind 15 to 25 mph, with gusts as high as 40 mph. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Rain, mainly before 4am. Low around 37. Windy. Chance of precipitation is 100%.
Wednesday
A chance of rain and snow before 7am, then a chance of snow between 7am and 10am, then a slight chance of rain after 10am. Partly sunny, with a high near 40. Breezy. Chance of precipitation is 50%. Little or no snow accumulation expected.
Wednesday Night
A chance of snow. Mostly cloudy, with a low around 30.
Thursday
A chance of snow before 10am, then a chance of rain between 10am and 4pm, then a chance of rain and snow after 4pm. Partly sunny, with a high near 39. Breezy.
Thursday Night
A chance of rain and snow before 10pm, then a slight chance of snow. Partly cloudy, with a low around 30.
Friday
Sunny, with a high near 43.
Friday Night
Mostly clear, with a low around 30.
Saturday
Sunny, with a high near 49.
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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:
1:07 pm PST Feb 15, 2026
Forecast Valid:
2pm PST Feb 15, 2026-6pm PST Feb 21, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation