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

83°F

28°C

Humidity 50%
Wind Speed NW 7 MPH
Barometer 29.83 in (1010.16 mb)
Dewpoint 62°F (17°C)
Visibility NA
Heat Index84°F (29°C)
Last update 18 Jun 02:23 PM PDT
Extended Forecast for

Fullerton CA

Heat Advisory June 18, 02:33pm until June 18, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory June 18, 02:33pm until June 18, 08:00pm

    NOW until 8:00pm Wed

    Heat Advisory

  • This Afternoon

    High: 87 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after 5am. Otherwise, increasing clouds, with a low around 62. South wind around 5 mph.

    Low: 62 °F

    Mostly Clear
    then Patchy
    Fog

  • Juneteenth

    Juneteenth: Patchy fog before 8am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 84. Light south wind becoming southwest 5 to 10 mph in the morning.

    High: 84 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 62. Southwest wind around 5 mph becoming calm after midnight.

    Low: 62 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 80. Light south wind becoming southwest 5 to 10 mph in the morning.

    High: 80 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 62.

    Low: 62 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 11am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 77.

    High: 77 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 59.

    Low: 59 °F

    Increasing
    Clouds

Detailed Forecast

This Afternoon
Sunny, with a high near 87. Southwest wind around 10 mph.
Tonight
Patchy fog after 5am. Otherwise, increasing clouds, with a low around 62. South wind around 5 mph.
Juneteenth
Patchy fog before 8am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 84. Light south wind becoming southwest 5 to 10 mph in the morning.
Thursday Night
Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 62. Southwest wind around 5 mph becoming calm after midnight.
Friday
Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 80. Light south wind becoming southwest 5 to 10 mph in the morning.
Friday Night
Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 62.
Saturday
Patchy fog before 11am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 77.
Saturday Night
Increasing clouds, with a low around 59.
Sunday
Patchy fog before 11am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 79.
Sunday Night
Mostly clear, with a low around 60.
Monday
Mostly sunny, with a high near 79.
Monday Night
Partly cloudy, with a low around 60.
Tuesday
Mostly sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fullerton CA
 33.87°N 117.93°W (Elev. 184 ft)
Last Update:
12:57 pm PDT Jun 18, 2025
Forecast Valid:
2pm PDT Jun 18, 2025-6pm PDT Jun 24, 2025
 
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