Hourly Weather Forecast - Fullerton, CA

12 AM
58°F
80%
4mph
SE
80% Chance of Rain
Humidity
96%
Feels like
58°F
Dew Point
57°F
1 AM
58°F
70%
4mph
ESE
70% Chance of Rain
Humidity
96%
Feels like
58°F
Dew Point
57°F
2 AM
58°F
60%
3mph
ESE
60% Chance of Rain
Humidity
96%
Feels like
58°F
Dew Point
57°F
3 AM
58°F
60%
3mph
E
60% Chance Rain Showers
Humidity
97%
Feels like
58°F
Dew Point
57°F

Rain And Snow Totals Through Monday

Atmospheric River Takes Aim For Northern California

The plume of abundant moisture impacting the Northwest the last several days will focus more on Northern California later today into Monday bringing heavy rainfall and mountain snow.

NOAA, NCDC

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Weekend Weather Outlook

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During Extreme Cold: Watch for Frostbite!

Flu Update Valid For Week Ending December 13, 2025

Weekly Flu Update: Flu Spreading Hard Across U.S.

Watch vs. Warning

Flash Flood Watch and Warning Defined

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