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

Hazardous Weather Conditions

Current conditions at

WHITTIER HILLS (WTHC1)

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

NA

86°F

30°C

Humidity 30%
Wind Speed WNW 5 MPH
Barometer NA
Dewpoint 51°F (11°C)
Visibility NA
Heat Index84°F (29°C)
Last update 03 Oct 09:57 PM PDT
Extended Forecast for

2 Miles WSW Diamond Bar CA

Extreme Heat Warning October 3, 10:21pm until October 8, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning October 3, 10:21pm until October 8, 08:00pm

    NOW until 8:00pm Thu

    Extreme Heat Warning

  • Tonight

    Low: 78 °F

    Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 101. East northeast wind 5 to 10 mph becoming south southwest in the afternoon. Winds could gust as high as 15 mph.

    High: 101 °F

    Hot

  • Sunday Night

    Sunday Night: Clear, with a low around 78. West southwest wind around 5 mph becoming calm.

    Low: 78 °F

    Clear

  • Monday

    Monday: Sunny and hot, with a high near 100. Northeast wind 5 to 10 mph becoming light and variable.

    High: 100 °F

    Hot

  • Monday Night

    Monday Night: Clear, with a low around 77. West southwest wind 5 to 10 mph becoming light and variable in the evening.

    Low: 77 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 100.

    High: 100 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 74.

    Low: 74 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

Detailed Forecast

Tonight
Clear, with a low around 78. West wind 5 to 10 mph becoming east northeast in the evening.
Sunday
Sunny and hot, with a high near 101. East northeast wind 5 to 10 mph becoming south southwest in the afternoon. Winds could gust as high as 15 mph.
Sunday Night
Clear, with a low around 78. West southwest wind around 5 mph becoming calm.
Monday
Sunny and hot, with a high near 100. Northeast wind 5 to 10 mph becoming light and variable.
Monday Night
Clear, with a low around 77. West southwest wind 5 to 10 mph becoming light and variable in the evening.
Tuesday
Sunny and hot, with a high near 100.
Tuesday Night
Clear, with a low around 74.
Wednesday
Sunny and hot, with a high near 98.
Wednesday Night
Clear, with a low around 71.
Thursday
Sunny and hot, with a high near 97.
Thursday Night
Clear, with a low around 70.
Friday
Sunny, with a high near 92.
Friday Night
Mostly clear, with a low around 68.
Saturday
Mostly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Diamond Bar CA
 34°N 117.85°W (Elev. 679 ft)
Last Update:
12:21 pm PDT Oct 3, 2026
Forecast Valid:
10pm PDT Oct 3, 2026-6pm PDT Oct 10, 2026
 
Forecast Discussion
 
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