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 27%
Wind Speed NE 5 MPH
Barometer 30.14 in (1020.66 mb)
Dewpoint 35°F (2°C)
Visibility NA
Last update 30 Dec 12:38 PM PST
Extended Forecast for

Fullerton CA

Flood Watch December 31, 10:00pm until January 1, 10:00pm
Click here for hazard details and duration
Flood Watch

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 74. East wind around 10 mph, with gusts as high as 20 mph.

    High: 74 °F

    Partly Sunny

  • Tonight

    Tonight: A slight chance of sprinkles before 10pm, then a chance of showers after 4am. Mostly cloudy, with a low around 60. East wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 60 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers, mainly after 10am. High near 68. East wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 68 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers. The rain could be heavy at times. Low around 57. East wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.

    Low: 57 °F

    Heavy Rain

  • New Year's Day

    New Year's Day: Showers, mainly before 4pm. The rain could be heavy at times. High near 65. South wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.

    High: 65 °F

    Heavy Rain

  • Thursday Night

    Thursday Night: A chance of showers, mainly before 10pm. Mostly cloudy, with a low around 57. Chance of precipitation is 40%.

    Low: 57 °F

    Chance
    Showers

  • Friday

    Friday: A slight chance of showers. Mostly cloudy, with a high near 65. Chance of precipitation is 20%.

    High: 65 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Chance
    Showers

  • Saturday

    Saturday: Showers likely. Mostly cloudy, with a high near 64.

    High: 64 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Partly sunny, with a high near 74. East wind around 10 mph, with gusts as high as 20 mph.
Tonight
A slight chance of sprinkles before 10pm, then a chance of showers after 4am. Mostly cloudy, with a low around 60. East wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Showers, mainly after 10am. High near 68. East wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Showers. The rain could be heavy at times. Low around 57. East wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.
New Year's Day
Showers, mainly before 4pm. The rain could be heavy at times. High near 65. South wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.
Thursday Night
A chance of showers, mainly before 10pm. Mostly cloudy, with a low around 57. Chance of precipitation is 40%.
Friday
A slight chance of showers. Mostly cloudy, with a high near 65. Chance of precipitation is 20%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 55.
Saturday
Showers likely. Mostly cloudy, with a high near 64.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 51.
Sunday
A chance of showers. Mostly cloudy, with a high near 64.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 49.
Monday
A slight chance of showers. Mostly cloudy, with a high near 65.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fullerton CA
 33.87°N 117.93°W (Elev. 184 ft)
Last Update:
12:27 pm PST Dec 30, 2025
Forecast Valid:
12pm PST Dec 30, 2025-6pm PST Jan 5, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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