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

69°F

21°C

Humidity 76%
Wind Speed S 1 MPH
Barometer 29.95 in (1014.22 mb)
Dewpoint 61°F (16°C)
Visibility NA
Last update 03 Sep 09:39 PM PDT
Extended Forecast for

Fullerton CA

  • Tonight

    Tonight: Partly cloudy, with a low around 64. Southwest wind around 5 mph becoming southeast after midnight.

    Low: 64 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 83. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 64. Southwest wind around 5 mph becoming calm after midnight.

    Low: 64 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 86. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 86 °F

    Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers. Partly cloudy, with a low around 69. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 69 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A chance of showers. Partly sunny, with a high near 87. Chance of precipitation is 40%.

    High: 87 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A slight chance of showers before 11pm. Partly cloudy, with a low around 68. Chance of precipitation is 20%.

    Low: 68 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 64. Southwest wind around 5 mph becoming southeast after midnight.
Friday
Sunny, with a high near 83. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Friday Night
Clear, with a low around 64. Southwest wind around 5 mph becoming calm after midnight.
Saturday
Sunny, with a high near 86. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 69. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Sunday
A chance of showers. Partly sunny, with a high near 87. Chance of precipitation is 40%.
Sunday Night
A slight chance of showers before 11pm. Partly cloudy, with a low around 68. Chance of precipitation is 20%.
Labor Day
Sunny, with a high near 88.
Monday Night
Partly cloudy, with a low around 68.
Tuesday
Mostly sunny, with a high near 90.
Tuesday Night
Partly cloudy, with a low around 69.
Wednesday
Mostly sunny, with a high near 91.
Wednesday Night
Mostly clear, with a low around 69.
Thursday
Sunny, with a high near 89.
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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:
1:30 pm PDT Sep 3, 2026
Forecast Valid:
9pm PDT Sep 3, 2026-6pm PDT Sep 10, 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