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

FW0063 Fullerton CSU (F0063)

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

NA

71°F

22°C

Humidity 68%
Wind Speed NW 8 MPH
Barometer 30.01 in (1016.26 mb)
Dewpoint 60°F (16°C)
Visibility NA
Last update 01 Sep 08:53 PM PDT
Extended Forecast for

Fullerton CA

  • Tonight

    Tonight: Mostly clear, with a low around 64. West wind around 5 mph becoming calm in the evening.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 84. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 84 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 65. Southwest wind around 5 mph becoming southeast after midnight.

    Low: 65 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Partly sunny, then gradually becoming sunny, with a high near 82. Southeast wind 5 to 10 mph becoming southwest in the afternoon.

    High: 82 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 65. Southwest wind around 5 mph becoming southeast after midnight.

    Low: 65 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Saturday

    Saturday: A slight chance of showers. Mostly sunny, with a high near 87.

    High: 87 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers. Mostly cloudy, with a low around 68.

    Low: 68 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 64. West wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 84. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Wednesday Night
Increasing clouds, with a low around 65. Southwest wind around 5 mph becoming southeast after midnight.
Thursday
Partly sunny, then gradually becoming sunny, with a high near 82. Southeast wind 5 to 10 mph becoming southwest in the afternoon.
Thursday Night
Mostly clear, with a low around 65. Southwest wind around 5 mph becoming southeast after midnight.
Friday
Sunny, with a high near 84.
Friday Night
Mostly clear, with a low around 65.
Saturday
A slight chance of showers. Mostly sunny, with a high near 87.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 68.
Sunday
A chance of showers. Partly sunny, with a high near 89.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 69.
Labor Day
A slight chance of showers. Mostly sunny, with a high near 89.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 68.
Tuesday
Mostly sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fullerton CA
 33.89°N 117.94°W (Elev. 197 ft)
Last Update:
11:24 am PDT Sep 1, 2026
Forecast Valid:
9pm PDT Sep 1, 2026-6pm PDT Sep 8, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation