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

82°F

28°C

Humidity 49%
Wind Speed WNW 7 MPH
Barometer 29.95 in (1014.22 mb)
Dewpoint 61°F (16°C)
Visibility NA
Heat Index83°F (28°C)
Last update 19 Sep 02:48 PM PDT
Extended Forecast for

Fullerton CA

  • Tonight

    Tonight: Increasing clouds, with a low around 67. Southwest wind 5 to 10 mph becoming light south in the evening.

    Low: 67 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Cloudy through mid morning, then gradual clearing, with a high near 81. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 81 °F

    Gradual
    Clearing

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 66. Southwest wind around 5 mph becoming calm in the evening.

    Low: 66 °F

    Increasing
    Clouds

  • Monday

    Monday: Cloudy through mid morning, then gradual clearing, with a high near 78. Light southwest wind increasing to 5 to 10 mph in the afternoon.

    High: 78 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 65. Southwest wind around 5 mph becoming calm in the evening.

    Low: 65 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, then gradually becoming sunny, with a high near 79.

    High: 79 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 67. Southwest wind 5 to 10 mph becoming light south in the evening.
Sunday
Cloudy through mid morning, then gradual clearing, with a high near 81. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Sunday Night
Increasing clouds, with a low around 66. Southwest wind around 5 mph becoming calm in the evening.
Monday
Cloudy through mid morning, then gradual clearing, with a high near 78. Light southwest wind increasing to 5 to 10 mph in the afternoon.
Monday Night
Increasing clouds, with a low around 65. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
Partly sunny, then gradually becoming sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 66.
Wednesday
Sunny, with a high near 86.
Wednesday Night
Mostly clear, with a low around 68.
Thursday
Mostly sunny, with a high near 88.
Thursday Night
Mostly clear, with a low around 68.
Friday
Sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 69.
Saturday
Mostly sunny, with a high near 88.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fullerton CA
 33.87°N 117.93°W (Elev. 184 ft)
Last Update:
2:12 pm PDT Sep 19, 2026
Forecast Valid:
3pm PDT Sep 19, 2026-6pm PDT Sep 26, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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