National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

GRASS MOUNTAIN (GMTC1)

Lat: 34.64078°NLon: 118.41435°WElev: 4626.0ft.

NA

53°F

12°C

Humidity 52%
Wind Speed SW 15 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Last update 20 Jun 01:59 AM PDT
Extended Forecast for

5 Miles WSW Quartz Hill CA

  • Overnight

    Overnight: Clear, with a low around 58. Southwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 58 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 74. Windy, with a southwest wind 15 to 20 mph increasing to 25 to 30 mph in the afternoon. Winds could gust as high as 40 mph.

    High: 74 °F

    Sunny and
    Windy

  • Saturday Night

    Saturday Night: Clear, with a low around 59. Breezy, with a southwest wind 20 to 25 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 40 mph.

    Low: 59 °F

    Clear and
    Breezy then
    Clear

  • Sunday

    Sunday: Sunny, with a high near 80. Breezy, with a southwest wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 35 mph.

    High: 80 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Clear, with a low around 61. Breezy, with a southwest wind 20 to 25 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 35 mph.

    Low: 61 °F

    Clear and
    Breezy then
    Clear

  • Monday

    Monday: Sunny, with a high near 86. Breezy.

    High: 86 °F

    Sunny and
    Breezy

  • Monday Night

    Monday Night: Clear, with a low around 65.

    Low: 65 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 69. Breezy.

    Low: 69 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

Detailed Forecast

Overnight
Clear, with a low around 58. Southwest wind around 15 mph, with gusts as high as 25 mph.
Saturday
Sunny, with a high near 74. Windy, with a southwest wind 15 to 20 mph increasing to 25 to 30 mph in the afternoon. Winds could gust as high as 40 mph.
Saturday Night
Clear, with a low around 59. Breezy, with a southwest wind 20 to 25 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 40 mph.
Sunday
Sunny, with a high near 80. Breezy, with a southwest wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 35 mph.
Sunday Night
Clear, with a low around 61. Breezy, with a southwest wind 20 to 25 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 35 mph.
Monday
Sunny, with a high near 86. Breezy.
Monday Night
Clear, with a low around 65.
Tuesday
Sunny, with a high near 90.
Tuesday Night
Mostly clear, with a low around 69. Breezy.
Wednesday
A slight chance of showers after 11am. Sunny, with a high near 87. Breezy.
Wednesday Night
Mostly clear, with a low around 69. Breezy.
Thursday
Sunny, with a high near 85. Breezy.
Thursday Night
Clear, with a low around 66. Breezy.
Friday
Sunny, with a high near 83. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Quartz Hill CA
 34.62°N 118.31°W (Elev. 3599 ft)
Last Update:
12:47 am PDT Jun 20, 2026
Forecast Valid:
2am PDT Jun 20, 2026-6pm PDT Jun 26, 2026
 
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