Hourly Weather Forecast - Fullerton, CA

12 AM
55°F
0%
2mph
NE
Foggy
Humidity
100%
Feels like
55°F
Dew Point
55°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
ENE
Foggy
Humidity
100%
Feels like
53°F
Dew Point
53°F
6 AM
53°F
0%
2mph
ENE
Foggy
Humidity
100%
Feels like
53°F
Dew Point
53°F
6:53 AM
7 AM
54°F
0%
2mph
ENE
Foggy
Humidity
100%
Feels like
54°F
Dew Point
54°F
8 AM
56°F
0%
2mph
ENE
Foggy
Humidity
99%
Feels like
56°F
Dew Point
56°F
9 AM
58°F
0%
2mph
NE
Partly Cloudy
Humidity
92%
Feels like
58°F
Dew Point
56°F
10 AM
60°F
0%
2mph
NW
Partly Cloudy
Humidity
88%
Feels like
60°F
Dew Point
56°F
11 AM
61°F
0%
2mph
W
Partly Cloudy
Humidity
85%
Feels like
61°F
Dew Point
56°F
12 PM
62°F
0%
3mph
WSW
Partly Cloudy
Humidity
82%
Feels like
62°F
Dew Point
56°F
1 PM
63°F
0%
4mph
WSW
Partly Cloudy
Humidity
80%
Feels like
63°F
Dew Point
57°F
2 PM
63°F
0%
4mph
WSW
Partly Cloudy
Humidity
80%
Feels like
63°F
Dew Point
57°F
3 PM
61°F
0%
4mph
WSW
Partly Cloudy
Humidity
86%
Feels like
61°F
Dew Point
57°F
4 PM
58°F
0%
4mph
WSW
Partly Cloudy
Humidity
95%
Feels like
58°F
Dew Point
57°F
4:47 PM
5 PM
56°F
0%
3mph
SW
Foggy
Humidity
100%
Feels like
56°F
Dew Point
56°F
6 PM
56°F
0%
3mph
SW
Foggy
Humidity
100%
Feels like
56°F
Dew Point
56°F
7 PM
55°F
0%
2mph
SW
Foggy
Humidity
100%
Feels like
55°F
Dew Point
55°F
8 PM
56°F
0%
2mph
SSW
Foggy
Humidity
100%
Feels like
56°F
Dew Point
56°F
9 PM
56°F
0%
2mph
SE
Foggy
Humidity
100%
Feels like
56°F
Dew Point
56°F
10 PM
56°F
0%
2mph
E
Foggy
Humidity
100%
Feels like
56°F
Dew Point
56°F
11 PM
56°F
0%
2mph
E
Foggy
Humidity
100%
Feels like
56°F
Dew Point
56°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

Weekend Weather Outlook

Weekend 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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