Current conditions at

WHITTIER HILLS (WTHC1)

Lat: 33.984°NLon: 118.00943°WElev: 950.0ft.

NA

68°F

20°C

Humidity 29%
Wind Speed NE 4 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Last update 15 Oct 04:57 AM PDT
Extended Forecast for

Diamond Bar CA

Red Flag Warning until October 17, 08:00pm
Click here for hazard details and duration
Red Flag Warning
  •  
    Red Flag Warning until October 17, 08:00pm

    NOW until 8:00pm Sat

    Red Flag Warning

  • Today

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 68. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 68 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 90. Breezy, with an east northeast wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 90 °F

    Sunny and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 69. Northeast wind around 15 mph, with gusts as high as 25 mph.

    Low: 69 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 87. Northeast wind 5 to 15 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph.

    High: 87 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 63.

    Low: 63 °F

    Clear

Detailed Forecast

Today
Sunny, with a high near 86. Northeast wind 5 to 15 mph, with gusts as high as 20 mph.
Tonight
Clear, with a low around 68. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 90. Breezy, with an east northeast wind 15 to 20 mph, with gusts as high as 30 mph.
Friday Night
Mostly clear, with a low around 69. Northeast wind around 15 mph, with gusts as high as 25 mph.
Saturday
Sunny, with a high near 87. Northeast wind 5 to 15 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Mostly clear, with a low around 65.
Sunday
Sunny, with a high near 84.
Sunday Night
Clear, with a low around 63.
Monday
Sunny, with a high near 81.
Monday Night
Mostly clear, with a low around 60.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 74.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 56.
Wednesday
A chance of showers. Partly sunny, with a high near 70.
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ABOUT THIS FORECAST

 
Point Forecast:
Diamond Bar CA
 34°N 117.82°W (Elev. 1014 ft)
1:31 am PDT Oct 15, 2026
6am PDT Oct 15, 2026-6pm PDT Oct 21, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database