Hourly Weather Forecast - Fullerton, CA

12 AM
54°F
0%
2mph
ENE
Foggy
Humidity
100%
Feels like
54°F
Dew Point
54°F
1 AM
54°F
0%
2mph
NE
Foggy
Humidity
100%
Feels like
54°F
Dew Point
54°F
2 AM
54°F
0%
2mph
NE
Foggy
Humidity
100%
Feels like
54°F
Dew Point
54°F
3 AM
54°F
0%
2mph
NE
Foggy
Humidity
100%
Feels like
54°F
Dew Point
54°F
4 AM
53°F
0%
2mph
NE
Foggy
Humidity
100%
Feels like
53°F
Dew Point
53°F
5 AM
53°F
0%
2mph
NE
Foggy
Humidity
100%
Feels like
53°F
Dew Point
53°F
6 AM
53°F
0%
2mph
NE
Foggy
Humidity
100%
Feels like
53°F
Dew Point
53°F
6:52 AM
7 AM
55°F
0%
2mph
NE
Foggy
Humidity
100%
Feels like
55°F
Dew Point
55°F
8 AM
56°F
0%
2mph
NE
Foggy
Humidity
99%
Feels like
56°F
Dew Point
56°F
9 AM
59°F
0%
1mph
NNE
Partly Cloudy
Humidity
92%
Feels like
59°F
Dew Point
56°F
10 AM
61°F
0%
1mph
NW
Partly Cloudy
Humidity
85%
Feels like
61°F
Dew Point
57°F
11 AM
63°F
0%
2mph
W
Partly Cloudy
Humidity
80%
Feels like
63°F
Dew Point
57°F
12 PM
65°F
0%
3mph
WSW
Partly Cloudy
Humidity
75%
Feels like
65°F
Dew Point
57°F
1 PM
66°F
0%
4mph
WSW
Mostly Sunny
Humidity
72%
Feels like
66°F
Dew Point
57°F
2 PM
66°F
0%
4mph
WSW
Mostly Sunny
Humidity
72%
Feels like
66°F
Dew Point
57°F
3 PM
64°F
0%
4mph
WSW
Mostly Sunny
Humidity
78%
Feels like
64°F
Dew Point
57°F
4 PM
62°F
0%
4mph
WSW
Mostly Sunny
Humidity
86%
Feels like
62°F
Dew Point
57°F
4:46 PM
5 PM
59°F
0%
3mph
WSW
Hazy
Humidity
91%
Feels like
59°F
Dew Point
57°F
6 PM
58°F
0%
2mph
W
Hazy
Humidity
96%
Feels like
58°F
Dew Point
56°F
7 PM
57°F
0%
2mph
W
Hazy
Humidity
98%
Feels like
57°F
Dew Point
56°F
8 PM
56°F
0%
2mph
WNW
Foggy
Humidity
99%
Feels like
56°F
Dew Point
56°F
9 PM
56°F
0%
2mph
NW
Foggy
Humidity
99%
Feels like
56°F
Dew Point
56°F
10 PM
56°F
0%
2mph
NNW
Foggy
Humidity
100%
Feels like
56°F
Dew Point
56°F
11 PM
55°F
0%
2mph
NNE
Foggy
Humidity
100%
Feels like
55°F
Dew Point
55°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

White Christmas? What Are The Odds

Sunday's Weather Outlook

Sunday's Weather Outlook

Cold weather

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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