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

45°F

7°C

Humidity 69%
Wind Speed SSW 20 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Wind Chill37°F (3°C)
Last update 20 Apr 09:59 PM PDT
Extended Forecast for

11 Miles W Quartz Hill CA

Wind Advisory April 21, 10:00am until April 21, 10:00pm
Click here for hazard details and duration
Wind Advisory

  • Tonight

    Tonight: Partly cloudy, with a low around 45. West southwest wind around 15 mph, with gusts as high as 20 mph.

    Low: 45 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Rain likely after 11am. Mostly cloudy, with a high near 57. Breezy, with a south southwest wind 10 to 15 mph increasing to 20 to 25 mph in the morning. Winds could gust as high as 35 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 57 °F

    Rain Likely
    and Breezy

  • Tuesday Night

    Tuesday Night: Rain likely before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 41. Breezy, with a southwest wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Breezy. Rain
    Likely then
    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 59. Breezy, with a west northwest wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 59 °F

    Sunny and
    Breezy then
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 42. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 42 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 45. West southwest wind around 15 mph, with gusts as high as 20 mph.
Tuesday
Rain likely after 11am. Mostly cloudy, with a high near 57. Breezy, with a south southwest wind 10 to 15 mph increasing to 20 to 25 mph in the morning. Winds could gust as high as 35 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Rain likely before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 41. Breezy, with a southwest wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Sunny, with a high near 59. Breezy, with a west northwest wind 10 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
Mostly clear, with a low around 42. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 65.
Thursday Night
Partly cloudy, with a low around 46.
Friday
Mostly sunny, with a high near 65.
Friday Night
Partly cloudy, with a low around 47.
Saturday
A slight chance of rain. Partly sunny, with a high near 57.
Saturday Night
Mostly cloudy, with a low around 45.
Sunday
Mostly sunny, with a high near 58.
Sunday Night
Partly cloudy, with a low around 45.
Monday
Mostly sunny, with a high near 62.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
11 Miles W Quartz Hill CA
 34.65°N 118.43°W (Elev. 3832 ft)
Last Update:
10:01 pm PDT Apr 20, 2026
Forecast Valid:
11pm PDT Apr 20, 2026-6pm PDT Apr 27, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation