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

71°F

22°C

Humidity 75%
Wind Speed N 4 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 63°F (17°C)
Visibility NA
Last update 04 Aug 09:08 PM PDT
Extended Forecast for

Fullerton CA

Heat Advisory August 6, 10:00am until August 8, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Widespread haze before 11pm. Patchy fog after 2am. Otherwise, partly cloudy, with a low around 65. South wind around 5 mph becoming calm after midnight.

    Low: 65 °F

    Haze then
    Patchy Fog

  • Tuesday

    Tuesday: Widespread haze after 11am. Patchy fog before 8am. Otherwise, sunny, with a high near 87. Light south wind becoming southwest 5 to 10 mph in the afternoon.

    High: 87 °F

    Patchy Fog
    then Haze

  • Tuesday Night

    Tuesday Night: Widespread haze before 11pm. Mostly clear, with a low around 66. Southwest wind around 5 mph becoming calm in the evening.

    Low: 66 °F

    Haze then
    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 91. Light south wind becoming southwest 5 to 10 mph in the afternoon.

    High: 91 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 67. Southwest wind around 5 mph becoming calm in the evening.

    Low: 67 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

  • Friday

    Friday: Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 92.

    High: 92 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 67.

    Low: 67 °F

    Increasing
    Clouds

Detailed Forecast

Tonight
Widespread haze before 11pm. Patchy fog after 2am. Otherwise, partly cloudy, with a low around 65. South wind around 5 mph becoming calm after midnight.
Tuesday
Widespread haze after 11am. Patchy fog before 8am. Otherwise, sunny, with a high near 87. Light south wind becoming southwest 5 to 10 mph in the afternoon.
Tuesday Night
Widespread haze before 11pm. Mostly clear, with a low around 66. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 91. Light south wind becoming southwest 5 to 10 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 67. Southwest wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 92.
Thursday Night
Partly cloudy, with a low around 68.
Friday
Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 92.
Friday Night
Increasing clouds, with a low around 67.
Saturday
Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 89.
Saturday Night
Increasing clouds, with a low around 67.
Sunday
Mostly sunny, with a high near 88.
Sunday Night
Partly cloudy, with a low around 67.
Monday
Mostly sunny, with a high near 87.
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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:
1:03 pm PDT Aug 4, 2025
Forecast Valid:
9pm PDT Aug 4, 2025-6pm PDT Aug 11, 2025
 
Forecast Discussion
 
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Additional Resources

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