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: 247.0ft.

NA

66°F

19°C

Humidity 24%
Wind Speed SE 13 MPH
Barometer 30.18 in (1022.01 mb)
Dewpoint 28°F (-2°C)
Visibility NA
Last update 29 Dec 09:23 PM PST
Extended Forecast for

Fullerton CA

  • Tonight

    Tonight: Increasing clouds, with a low around 53. Northeast wind 5 to 10 mph.

    Low: 53 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, with a high near 74. East wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 74 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers after 4am. Mostly cloudy, with a low around 59. Northeast wind 5 to 10 mph. Chance of precipitation is 30%.

    Low: 59 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers likely, mainly after 10am. Mostly cloudy, with a high near 68. Northeast wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 68 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers. The rain could be heavy at times. Low around 58. East wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.

    Low: 58 °F

    Heavy Rain

  • New Year's Day

    New Year's Day: Showers. The rain could be heavy at times. High near 66. Chance of precipitation is 90%.

    High: 66 °F

    Heavy Rain

  • Thursday Night

    Thursday Night: Showers likely, mainly before 10pm. Mostly cloudy, with a low around 57. Chance of precipitation is 60%.

    Low: 57 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers. Partly sunny, with a high near 66.

    High: 66 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers. Mostly cloudy, with a low around 56.

    Low: 56 °F

    Chance
    Showers

Detailed Forecast

Tonight
Increasing clouds, with a low around 53. Northeast wind 5 to 10 mph.
Tuesday
Partly sunny, with a high near 74. East wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
A chance of showers after 4am. Mostly cloudy, with a low around 59. Northeast wind 5 to 10 mph. Chance of precipitation is 30%.
Wednesday
Showers likely, mainly after 10am. Mostly cloudy, with a high near 68. Northeast wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Showers. The rain could be heavy at times. Low around 58. East wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.
New Year's Day
Showers. The rain could be heavy at times. High near 66. Chance of precipitation is 90%.
Thursday Night
Showers likely, mainly before 10pm. Mostly cloudy, with a low around 57. Chance of precipitation is 60%.
Friday
A chance of showers. Partly sunny, with a high near 66.
Friday Night
A chance of showers. Mostly cloudy, with a low around 56.
Saturday
Showers likely. Mostly cloudy, with a high near 64.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 52.
Sunday
A chance of showers. Partly sunny, with a high near 64.
Sunday Night
A chance of showers. Partly cloudy, with a low around 49.
Monday
A chance of showers. Mostly sunny, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Fullerton CA
 33.87°N 117.93°W (Elev. 184 ft)
Last Update:
12:55 pm PST Dec 29, 2025
Forecast Valid:
9pm PST Dec 29, 2025-6pm PST Jan 5, 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