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: 243.01ft.

NA

69°F

21°C

Humidity 89%
Wind Speed S 1 MPH
Barometer 29.91 in (1012.87 mb)
Dewpoint 66°F (19°C)
Visibility NA
Last update 29 Jul 03:08 AM PDT
Extended Forecast for

Placentia CA

Extreme Heat Warning July 31, 10:00am until August 2, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning

  • Overnight

    Overnight: Patchy fog. Otherwise, mostly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 88. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 88 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 66. Southwest wind 5 to 10 mph becoming light in the evening.

    Low: 66 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 11am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 90. Light west wind becoming southwest 5 to 10 mph in the afternoon.

    High: 90 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66. Southwest wind 5 to 10 mph becoming light south in the evening.

    Low: 66 °F

    Mostly Clear

  • Friday

    Friday: Patchy fog before 11am. Otherwise, sunny, with a high near 94.

    High: 94 °F

    Patchy Fog
    then Sunny

  • Friday Night

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

    Low: 68 °F

    Mostly Clear

  • Saturday

    Saturday: Patchy fog before 11am. Otherwise, sunny, with a high near 95.

    High: 95 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly cloudy, with a low around 66. Calm wind.
Wednesday
Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 88. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Wednesday Night
Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 66. Southwest wind 5 to 10 mph becoming light in the evening.
Thursday
Patchy fog before 11am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 90. Light west wind becoming southwest 5 to 10 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 66. Southwest wind 5 to 10 mph becoming light south in the evening.
Friday
Patchy fog before 11am. Otherwise, sunny, with a high near 94.
Friday Night
Mostly clear, with a low around 68.
Saturday
Patchy fog before 11am. Otherwise, sunny, with a high near 95.
Saturday Night
Mostly clear, with a low around 70.
Sunday
Sunny, with a high near 94.
Sunday Night
Mostly clear, with a low around 69.
Monday
Sunny, with a high near 91.
Monday Night
Mostly clear, with a low around 67.
Tuesday
Sunny, with a high near 91.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Placentia CA
 33.9°N 117.86°W (Elev. 351 ft)
Last Update:
12:29 am PDT Jul 29, 2026
Forecast Valid:
3am PDT Jul 29, 2026-6pm PDT Aug 4, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation