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

67°F

19°C

Humidity 90%
Wind Speed SSE 1 MPH
Barometer NA
Dewpoint 64°F (18°C)
Visibility NA
Last update 13 Jul 02:57 AM PDT
Extended Forecast for

3 Miles WNW Diamond Bar CASimilar City Names

Extreme Heat Watch July 14, 10:00am until July 16, 08:00pm
Heat Advisory July 13, 04:13am until July 14, 10:00am
Click here for hazard details and duration
Extreme Heat Watch
Heat Advisory
  •  
    Heat Advisory July 13, 04:13am until July 14, 10:00am

    NOW until 10:00am Tue

    Heat Advisory

  • Today

    High: 92 °F

    Mostly Cloudy

  • Tonight

    Tonight: Partly cloudy, with a low around 68. West southwest wind 5 to 10 mph becoming light south southwest in the evening.

    Low: 68 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny and hot, with a high near 97. Light south wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 97 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 71. West southwest wind 5 to 10 mph becoming light south southwest in the evening.

    Low: 71 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 103. Light south wind becoming west southwest 5 to 10 mph in the morning.

    High: 103 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 73.

    Low: 73 °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 67.

    Low: 67 °F

    Mostly Clear

Detailed Forecast

Today
Mostly cloudy, with a high near 92. Light southwest wind becoming west southwest 5 to 10 mph in the morning.
Tonight
Partly cloudy, with a low around 68. West southwest wind 5 to 10 mph becoming light south southwest in the evening.
Tuesday
Sunny and hot, with a high near 97. Light south wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.
Tuesday Night
Mostly clear, with a low around 71. West southwest wind 5 to 10 mph becoming light south southwest in the evening.
Wednesday
Sunny and hot, with a high near 103. Light south wind becoming west southwest 5 to 10 mph in the morning.
Wednesday Night
Mostly clear, with a low around 73.
Thursday
Sunny and hot, with a high near 98.
Thursday Night
Mostly clear, with a low around 67.
Friday
Mostly sunny, with a high near 89.
Friday Night
Partly cloudy, with a low around 65.
Saturday
Mostly sunny, with a high near 90.
Saturday Night
Partly cloudy, with a low around 66.
Sunday
Mostly sunny, with a high near 90.
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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:
3:23 am PDT Jul 13, 2026
Forecast Valid:
4am PDT Jul 13, 2026-6pm PDT Jul 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation