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

68°F

20°C

Humidity 100%
Wind Speed SE 4 MPH
Barometer NA
Dewpoint 68°F (20°C)
Visibility NA
Last update 25 Aug 05:57 AM PDT
Extended Forecast for

2 Miles NNW Fullerton Municipal CA

Heat Advisory August 25, 06:15am until August 25, 10:00am
Extreme Heat Warning August 25, 10:00am until August 28, 08:00pm
Click here for hazard details and duration
...
Extreme Heat Warning
  •  
    Heat Advisory August 25, 06:15am until August 25, 10:00am

    NOW until 10:00am Tue

    Heat Advisory

  • Today

    High: 100 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 71. Southwest wind 5 to 10 mph becoming light south in the evening.

    Low: 71 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 102. Heat index values as high as 108. Light south southeast wind becoming southwest 5 to 10 mph in the afternoon.

    High: 102 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 72. Southwest wind 5 to 10 mph becoming light and variable in the evening.

    Low: 72 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 101. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 101 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 75.

    Low: 75 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny and hot, with a high near 100.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy

Detailed Forecast

Today
Mostly sunny and hot, with a high near 100. Heat index values as high as 106. Light southwest wind increasing to 5 to 10 mph in the afternoon.
Tonight
Mostly clear, with a low around 71. Southwest wind 5 to 10 mph becoming light south in the evening.
Wednesday
Sunny and hot, with a high near 102. Heat index values as high as 108. Light south southeast wind becoming southwest 5 to 10 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 72. Southwest wind 5 to 10 mph becoming light and variable in the evening.
Thursday
Mostly sunny and hot, with a high near 101. Calm wind becoming southwest around 5 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 75.
Friday
Mostly sunny and hot, with a high near 100.
Friday Night
Partly cloudy, with a low around 74.
Saturday
Sunny, with a high near 95.
Saturday Night
Mostly clear, with a low around 70.
Sunday
Sunny, with a high near 90.
Sunday Night
Mostly clear, with a low around 68.
Monday
Sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Fullerton Municipal CA
 33.91°N 117.99°W (Elev. 197 ft)
Last Update:
12:06 am PDT Aug 25, 2026
Forecast Valid:
6am PDT Aug 25, 2026-6pm PDT Aug 31, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation