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

Fullerton, Fullerton Municipal Airport (KFUL)

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

Clear

64°F

18°C

Humidity 36%
Wind Speed E 4 MPH
Barometer 29.92 in (1013.21 mb)
Dewpoint 37°F (3°C)
Visibility 9.00 mi
Last update 20 May 07:20 AM PDT
Extended Forecast for

Fullerton Municipal CA

  • Today

    Today: Sunny, with a high near 83. Light and variable wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 83 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 61. Southwest wind 5 to 10 mph becoming light and variable after midnight.

    Low: 61 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 78. Light south wind becoming southwest 5 to 10 mph in the morning.

    High: 78 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 59. South wind 5 to 10 mph becoming light after midnight.

    Low: 59 °F

    Increasing
    Clouds

  • Friday

    Friday: Mostly cloudy through mid morning, then gradual clearing, with a high near 76. Light south wind becoming southwest 5 to 10 mph in the morning.

    High: 76 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 58.

    Low: 58 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Cloudy through mid morning, then gradual clearing, with a high near 76.

    High: 76 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 58.

    Low: 58 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 76.

    High: 76 °F

    Becoming
    Sunny

Detailed Forecast

Today
Sunny, with a high near 83. Light and variable wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Tonight
Mostly clear, with a low around 61. Southwest wind 5 to 10 mph becoming light and variable after midnight.
Thursday
Mostly sunny, with a high near 78. Light south wind becoming southwest 5 to 10 mph in the morning.
Thursday Night
Increasing clouds, with a low around 59. South wind 5 to 10 mph becoming light after midnight.
Friday
Mostly cloudy through mid morning, then gradual clearing, with a high near 76. Light south wind becoming southwest 5 to 10 mph in the morning.
Friday Night
Increasing clouds, with a low around 58.
Saturday
Cloudy through mid morning, then gradual clearing, with a high near 76.
Saturday Night
Increasing clouds, with a low around 58.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 76.
Sunday Night
Increasing clouds, with a low around 57.
Memorial Day
Partly sunny, then gradually becoming sunny, with a high near 74.
Monday Night
Increasing clouds, with a low around 56.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 70.
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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:
12:46 am PDT May 20, 2026
Forecast Valid:
7am PDT May 20, 2026-6pm PDT May 26, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation