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

FW0063 Fullerton CSU (F0063)

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

NA

69°F

21°C

Humidity 80%
Wind Speed E 1 MPH
Barometer 29.71 in (1006.1 mb)
Dewpoint 63°F (17°C)
Visibility NA
Last update 10 Oct 06:53 AM PDT
Extended Forecast for

Fullerton CA

  • Today

    Today: Mostly cloudy, with a high near 84. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 84 °F

    Mostly Cloudy

  • Tonight

    Tonight: Showers likely, mainly after 11pm. Cloudy, with a low around 66. West wind 5 to 10 mph becoming northeast after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 66 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers likely, mainly before 11am. Cloudy, with a high near 73. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    High: 73 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers, mainly after 11pm. Low around 60. South wind 5 to 10 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 60 °F

    Showers

  • Columbus Day

    Columbus Day: Showers. High near 68. South wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 68 °F

    Showers then
    Showers
    Likely

  • Monday Night

    Monday Night: A chance of showers, mainly before 11pm. Mostly cloudy, with a low around 54. Chance of precipitation is 50%.

    Low: 54 °F

    Chance
    Showers then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 84. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Tonight
Showers likely, mainly after 11pm. Cloudy, with a low around 66. West wind 5 to 10 mph becoming northeast after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Showers likely, mainly before 11am. Cloudy, with a high near 73. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Showers, mainly after 11pm. Low around 60. South wind 5 to 10 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Columbus Day
Showers. High near 68. South wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
A chance of showers, mainly before 11pm. Mostly cloudy, with a low around 54. Chance of precipitation is 50%.
Tuesday
Mostly sunny, with a high near 72.
Tuesday Night
Mostly clear, with a low around 56.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Clear, with a low around 60.
Thursday
Sunny, with a high near 86.
Thursday Night
Clear, with a low around 65.
Friday
Sunny, with a high near 93.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Fullerton CA
 33.87°N 117.93°W (Elev. 184 ft)
Last Update:
2:45 am PDT Oct 10, 2026
Forecast Valid:
7am PDT Oct 10, 2026-6pm PDT Oct 16, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation