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

73°F

23°C

Humidity 39%
Wind Speed SE 3 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 47°F (8°C)
Visibility NA
Last update 18 Oct 09:23 AM PDT
Extended Forecast for

Fullerton CA

  • Today

    Today: Sunny, with a high near 88. Light and variable wind becoming west 5 to 10 mph in the afternoon.

    High: 88 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 63. West wind around 5 mph becoming calm in the evening.

    Low: 63 °F

    Clear

  • Monday

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

    High: 84 °F

    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 62. Southwest wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 80. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 80 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers after 11pm. Partly cloudy, with a low around 61. Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers. Partly sunny, with a high near 76. Chance of precipitation is 40%.

    High: 76 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers. Mostly cloudy, with a low around 59.

    Low: 59 °F

    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm. Mostly cloudy, with a high near 71.

    High: 71 °F

    Showers

Detailed Forecast

Today
Sunny, with a high near 88. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Tonight
Clear, with a low around 63. West wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 84. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Monday Night
Increasing clouds, with a low around 62. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 80. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Tuesday Night
A slight chance of showers after 11pm. Partly cloudy, with a low around 61. Chance of precipitation is 20%.
Wednesday
A chance of showers. Partly sunny, with a high near 76. Chance of precipitation is 40%.
Wednesday Night
Showers. Mostly cloudy, with a low around 59.
Thursday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 71.
Thursday Night
A chance of showers before 11pm. Partly cloudy, with a low around 56.
Friday
Sunny, with a high near 72.
Friday Night
Mostly clear, with a low around 56.
Saturday
Sunny, with a high near 77.
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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:
12:45 am PDT Oct 18, 2026
Forecast Valid:
9am PDT Oct 18, 2026-6pm PDT Oct 24, 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