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

Hazardous Weather Conditions

Current conditions at

Fullerton, Fullerton Municipal Airport (KFUL)

Lat: 33.87194°NLon: 117.98472°WElev: 95.0ft.

Clear

86°F

30°C

Humidity 20%
Wind Speed N 3 MPH
Barometer 30.15 in (1021.0 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 12 Mar 11:53 AM PDT
Extended Forecast for

Fullerton Municipal CA

Heat Advisory until March 13, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until March 13, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • This Afternoon

    High: 95 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 60. West wind around 5 mph becoming calm in the evening.

    Low: 60 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 92. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 92 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 58. Southwest wind around 5 mph becoming calm.

    Low: 58 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 11am. Otherwise, partly sunny, with a high near 85. Light south wind becoming southwest 5 to 10 mph in the afternoon.

    High: 85 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

  • Sunday

    Sunday: Patchy fog before 11am. Otherwise, partly sunny, with a high near 86.

    High: 86 °F

    Patchy Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Sunny, with a high near 95. West wind 5 to 10 mph.
Tonight
Mostly clear, with a low around 60. West wind around 5 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 92. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Friday Night
Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 58. Southwest wind around 5 mph becoming calm.
Saturday
Patchy fog before 11am. Otherwise, partly sunny, with a high near 85. Light south wind becoming southwest 5 to 10 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 54.
Sunday
Patchy fog before 11am. Otherwise, partly sunny, with a high near 86.
Sunday Night
Mostly clear, with a low around 56.
Monday
Sunny, with a high near 92.
Monday Night
Mostly clear, with a low around 59.
Tuesday
Sunny, with a high near 94.
Tuesday Night
Clear, with a low around 60.
Wednesday
Sunny, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fullerton Municipal CA
 33.86°N 117.99°W (Elev. 69 ft)
Last Update:
10:22 am PDT Mar 12, 2026
Forecast Valid:
12pm PDT Mar 12, 2026-6pm PDT Mar 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation