Current conditions at

FW0063 Fullerton CSU (F0063)

Lat: 33.8805°NLon: 117.88417°WElev: 243.01ft.

NA

80°F

27°C

Humidity 30%
Wind Speed ESE 1 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 46°F (8°C)
Visibility NA
Heat Index79°F (26°C)
Last update 13 Mar 10:23 AM PDT
Extended Forecast for

Fullerton CA

Extreme Heat Watch March 16, 10:00am until March 20, 08:00pm
Heat Advisory March 13, 10:34am until March 13, 08:00pm
Click here for hazard details and duration
Extreme Heat Watch
Heat Advisory
  •  
    Heat Advisory March 13, 10:34am until March 13, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Today

    High: 91 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 58. Southwest wind around 5 mph becoming calm  in the evening.

    Low: 58 °F

    Partly Cloudy

  • Saturday

    Saturday: Patchy fog between 8am and 11am.  Otherwise, mostly sunny, with a high near 81. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 81 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 55. Southwest wind around 5 mph becoming calm  in the evening.

    Low: 55 °F

    Mostly Clear

  • Sunday

    Sunday: Patchy fog before 11am.  Otherwise, mostly sunny, with a high near 88. Calm wind becoming west around 5 mph in the morning.

    High: 88 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Monday

    Monday: Patchy fog before 11am.  Otherwise, sunny, with a high near 91.

    High: 91 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

Detailed Forecast

Today
Sunny, with a high near 91. Light southwest wind increasing to 5 to 10 mph in the afternoon.
Tonight
Partly cloudy, with a low around 58. Southwest wind around 5 mph becoming calm in the evening.
Saturday
Patchy fog between 8am and 11am. Otherwise, mostly sunny, with a high near 81. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 55. Southwest wind around 5 mph becoming calm in the evening.
Sunday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 88. Calm wind becoming west around 5 mph in the morning.
Sunday Night
Mostly clear, with a low around 59.
Monday
Patchy fog before 11am. Otherwise, sunny, with a high near 91.
Monday Night
Mostly clear, with a low around 62.
Tuesday
Sunny, with a high near 95.
Tuesday Night
Clear, with a low around 63.
Wednesday
Sunny, with a high near 95.
Wednesday Night
Clear, with a low around 62.
Thursday
Sunny, with a high near 95.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Fullerton CA
 33.87°N 117.93°W (Elev. 184 ft)
12:24 am PDT Mar 13, 2026
10am PDT Mar 13, 2026-6pm PDT Mar 19, 2026
 
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