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

Hazardous Weather Conditions

Current conditions at

FW0063 Fullerton CSU (F0063)

Lat: 33.8805°NLon: 117.88417°WElev: 243.01ft.

NA

80°F

27°C

Humidity 65%
Wind Speed NE 1 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 67°F (19°C)
Visibility NA
Heat Index82°F (28°C)
Last update 09 Sep 05:08 AM PDT
Extended Forecast for

Brea CA

Heat Advisory September 9, 08:00pm until September 10, 08:00pm
Extreme Heat Warning September 9, 05:26am until September 9, 08:00pm
Click here for hazard details and duration
Heat Advisory
Extreme Heat Warning
  •  
    Extreme Heat Warning September 9, 05:26am until September 9, 08:00pm

    NOW until 8:00pm Wed

    Extreme Heat Warning

  • Today

    High: 105 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 75. West wind around 5 mph becoming calm in the evening.

    Low: 75 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 97. Heat index values as high as 105. Light south wind becoming southwest 5 to 10 mph in the afternoon.

    High: 97 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 71. Southwest wind around 5 mph becoming calm in the evening.

    Low: 71 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 91. Light south wind becoming southwest 5 to 10 mph in the morning.

    High: 91 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Saturday

    Saturday: Patchy fog before 11am. Otherwise, sunny, with a high near 85.

    High: 85 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

Detailed Forecast

Today
Sunny, with a high near 105. Heat index values as high as 116. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Tonight
Partly cloudy, with a low around 75. West wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 97. Heat index values as high as 105. Light south wind becoming southwest 5 to 10 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 71. Southwest wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 91. Light south wind becoming southwest 5 to 10 mph in the morning.
Friday Night
Mostly clear, with a low around 66.
Saturday
Patchy fog before 11am. Otherwise, sunny, with a high near 85.
Saturday Night
Mostly clear, with a low around 63.
Sunday
Sunny, with a high near 83.
Sunday Night
Mostly clear, with a low around 63.
Monday
Sunny, with a high near 84.
Monday Night
Clear, with a low around 61.
Tuesday
Sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Brea CA
 33.92°N 117.89°W (Elev. 361 ft)
Last Update:
1:36 am PDT Sep 9, 2026
Forecast Valid:
5am PDT Sep 9, 2026-6pm PDT Sep 15, 2026
 
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Additional Resources

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