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

84°F

29°C

Humidity 43%
Wind Speed W 10 MPH
Barometer NA
Dewpoint 59°F (15°C)
Visibility NA
Heat Index84°F (29°C)
Last update 17 Aug 06:57 PM PDT
Extended Forecast for

3 Miles WNW Diamond Bar CASimilar City Names

Heat Advisory August 18, 10:00am until August 20, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Partly cloudy, with a low around 66. West southwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 15 mph.

    Low: 66 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny and hot, with a high near 96. Light west southwest wind increasing to 5 to 10 mph in the afternoon.

    High: 96 °F

    Hot

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 66. West southwest wind 5 to 10 mph becoming light southwest in the evening.

    Low: 66 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny and hot, with a high near 96. Light and variable wind becoming west southwest 5 to 10 mph in the afternoon.

    High: 96 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 67. West southwest wind 5 to 10 mph becoming light south southwest in the evening.

    Low: 67 °F

    Mostly Clear

  • Thursday

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

    High: 98 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 96.

    High: 96 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 66. West southwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 15 mph.
Tuesday
Sunny and hot, with a high near 96. Light west southwest wind increasing to 5 to 10 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 66. West southwest wind 5 to 10 mph becoming light southwest in the evening.
Wednesday
Sunny and hot, with a high near 96. Light and variable wind becoming west southwest 5 to 10 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 67. West southwest wind 5 to 10 mph becoming light south southwest in the evening.
Thursday
Sunny and hot, with a high near 98.
Thursday Night
Mostly clear, with a low around 68.
Friday
Sunny and hot, with a high near 96.
Friday Night
Mostly clear, with a low around 68.
Saturday
Sunny, with a high near 95.
Saturday Night
Mostly clear, with a low around 68.
Sunday
Sunny, with a high near 94.
Sunday Night
Mostly clear, with a low around 67.
Monday
Sunny, with a high near 94.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Diamond Bar CASimilar City Names
 34.02°N 117.85°W (Elev. 561 ft)
Last Update:
11:26 am PDT Aug 17, 2026
Forecast Valid:
7pm PDT Aug 17, 2026-6pm PDT Aug 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation