National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

FW0063 Fullerton CSU (F0063)

Lat: 33.8805°NLon: 117.88417°WElev: 247.0ft.

NA

19°C

66°F

Humidity 86%
Wind Speed WNW 0 MPH
Barometer 29.85 in (1010.84 mb)
Dewpoint 17°C (62°F)
Visibility NA
Last update 18 Jun 02:23 AM PDT
Extended Forecast for

Fullerton CA

Heat Advisory June 18, 02:36am until June 18, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory June 18, 02:36am until June 18, 08:00pm

    NOW until 8:00pm Wed

    Heat Advisory

  • Overnight

    Low: 17 °C

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 32. Southwest wind 5 to 10 km/h increasing to 10 to 15 km/h in the afternoon.

    High: 32 °C

    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 17. South wind 5 to 10 km/h.

    Low: 17 °C

    Increasing
    Clouds

  • Juneteenth

    Juneteenth: Patchy fog before 11am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 28. Light south wind becoming southwest 10 to 15 km/h in the morning.

    High: 28 °C

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 17. Southwest wind 5 to 10 km/h.

    Low: 17 °C

    Increasing
    Clouds

  • Friday

    Friday: Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 27.

    High: 27 °C

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 16.

    Low: 16 °C

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, then gradually becoming sunny, with a high near 25.

    High: 25 °C

    Becoming
    Sunny

Detailed Forecast

Overnight
Mostly clear, with a low around 17. Calm wind.
Wednesday
Sunny, with a high near 32. Southwest wind 5 to 10 km/h increasing to 10 to 15 km/h in the afternoon.
Wednesday Night
Increasing clouds, with a low around 17. South wind 5 to 10 km/h.
Juneteenth
Patchy fog before 11am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 28. Light south wind becoming southwest 10 to 15 km/h in the morning.
Thursday Night
Increasing clouds, with a low around 17. Southwest wind 5 to 10 km/h.
Friday
Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 27.
Friday Night
Increasing clouds, with a low around 16.
Saturday
Partly sunny, then gradually becoming sunny, with a high near 25.
Saturday Night
Partly cloudy, with a low around 16.
Sunday
Mostly sunny, with a high near 26.
Sunday Night
Partly cloudy, with a low around 16.
Monday
Mostly sunny, with a high near 26.
Monday Night
Partly cloudy, with a low around 16.
Tuesday
Mostly sunny, with a high near 26.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fullerton CA
 33.87°N 117.93°W (Elev. 184 m)
Last Update:
1:57 pm PDT Jun 17, 2025
Forecast Valid:
2am PDT Jun 18, 2025-6pm PDT Jun 24, 2025
 
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