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Hazardous Weather Conditions

Current conditions at

FW0063 Fullerton CSU (F0063)

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

NA

76°F

24°C

Humidity 66%
Wind Speed NE 0 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 64°F (18°C)
Visibility NA
Heat Index78°F (26°C)
Last update 26 Aug 01:23 AM PDT
Extended Forecast for

Fullerton CA

Extreme Heat Warning August 26, 01:36am until August 28, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 26, 01:36am until August 28, 08:00pm

    NOW until 8:00pm Fri

    Extreme Heat Warning

  • Overnight

    Low: 72 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 98. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 98 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 74. South wind around 5 mph becoming calm in the evening.

    Low: 74 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 99. Light southwest wind increasing to 5 to 10 mph in the afternoon.

    High: 99 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 75. Southwest wind around 5 mph becoming calm in the evening.

    Low: 75 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 98.

    High: 98 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

Detailed Forecast

Overnight
Mostly clear, with a low around 72. Calm wind.
Wednesday
Sunny, with a high near 98. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Wednesday Night
Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 74. South wind around 5 mph becoming calm in the evening.
Thursday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 99. Light southwest wind increasing to 5 to 10 mph in the afternoon.
Thursday Night
Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 75. Southwest wind around 5 mph becoming calm in the evening.
Friday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 98.
Friday Night
Mostly clear, with a low around 75.
Saturday
Sunny, with a high near 95.
Saturday Night
Mostly clear, with a low around 70.
Sunday
Sunny, with a high near 89.
Sunday Night
Mostly clear, with a low around 68.
Monday
Sunny, with a high near 87.
Monday Night
Mostly clear, with a low around 67.
Tuesday
Mostly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fullerton CA
 33.87°N 117.93°W (Elev. 184 ft)
Last Update:
12:10 am PDT Aug 26, 2026
Forecast Valid:
1am PDT Aug 26, 2026-6pm PDT Sep 1, 2026
 
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Additional Resources

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