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

69°F

21°C

Humidity 86%
Wind Speed N 0 MPH
Barometer 29.95 in (1014.22 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 20 Aug 02:53 AM PDT
Extended Forecast for

Fullerton Municipal CA

Heat Advisory August 21, 10:00am until August 22, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Mostly clear, with a low around 66. Calm wind.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 89. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 89 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 69. West wind around 5 mph becoming calm in the evening.

    Low: 69 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 91. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 91 °F

    Patchy Fog
    then Sunny

  • Thursday Night

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

    Low: 71 °F

    Mostly Clear

  • Friday

    Friday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 92.

    High: 92 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 72.

    Low: 72 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 90.

    High: 90 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 71.

    Low: 71 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 66. Calm wind.
Wednesday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 89. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Wednesday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 69. West wind around 5 mph becoming calm in the evening.
Thursday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 91. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 71. South wind around 5 mph becoming calm in the evening.
Friday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 92.
Friday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 72.
Saturday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 90.
Saturday Night
Mostly clear, with a low around 71.
Sunday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 89.
Sunday Night
Mostly clear, with a low around 70.
Monday
Patchy fog. Otherwise, mostly sunny, with a high near 87.
Monday Night
Patchy fog. Otherwise, partly cloudy, with a low around 68.
Tuesday
Patchy fog. Otherwise, mostly sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Fullerton Municipal CA
 33.86°N 117.99°W (Elev. 69 ft)
Last Update:
2:05 am PDT Aug 20, 2025
Forecast Valid:
3am PDT Aug 20, 2025-6pm PDT Aug 26, 2025
 
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Additional Resources

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