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

68°F

20°C

Humidity 76%
Wind Speed N 0 MPH
Barometer 29.85 in (1010.84 mb)
Dewpoint 60°F (16°C)
Visibility NA
Last update 09 Oct 06:08 AM PDT
Extended Forecast for

Fullerton CA

  • Today

    Today: Sunny, with a high near 89. Light southwest wind increasing to 5 to 10 mph in the afternoon.

    High: 89 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 66. West wind around 5 mph becoming calm in the evening.

    Low: 66 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Cloudy, with a high near 81. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 81 °F

    Cloudy

  • Saturday Night

    Saturday Night: A chance of showers after 11pm. Mostly cloudy, with a low around 65. Calm wind becoming northwest around 5 mph after midnight. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 65 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers. Mostly cloudy, with a high near 76. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.

    High: 76 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Showers likely, mainly after 11pm. Mostly cloudy, with a low around 58. Chance of precipitation is 70%.

    Low: 58 °F

    Showers
    Likely

  • Columbus Day

    Columbus Day: Showers. High near 69. Chance of precipitation is 80%.

    High: 69 °F

    Showers

  • Monday Night

    Monday Night: A chance of showers, mainly before 11pm. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 89. Light southwest wind increasing to 5 to 10 mph in the afternoon.
Tonight
Increasing clouds, with a low around 66. West wind around 5 mph becoming calm in the evening.
Saturday
Cloudy, with a high near 81. Calm wind becoming southwest around 5 mph in the afternoon.
Saturday Night
A chance of showers after 11pm. Mostly cloudy, with a low around 65. Calm wind becoming northwest around 5 mph after midnight. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
A chance of showers. Mostly cloudy, with a high near 76. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Showers likely, mainly after 11pm. Mostly cloudy, with a low around 58. Chance of precipitation is 70%.
Columbus Day
Showers. High near 69. Chance of precipitation is 80%.
Monday Night
A chance of showers, mainly before 11pm. Mostly cloudy, with a low around 54.
Tuesday
Sunny, with a high near 72.
Tuesday Night
Clear, with a low around 56.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Clear, with a low around 60.
Thursday
Sunny, with a high near 87.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Fullerton CA
 33.89°N 117.94°W (Elev. 197 ft)
Last Update:
12:22 am PDT Oct 9, 2026
Forecast Valid:
6am PDT Oct 9, 2026-6pm PDT Oct 15, 2026
 
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Additional Resources

Radar & Satellite Image

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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