Hourly Weather Forecast - Fullerton, CA

3 AM
53°F
0%
2mph
ESE
Foggy
Humidity
99%
Feels like
53°F
Dew Point
53°F
4 AM
53°F
0%
3mph
ESE
Foggy
Humidity
100%
Feels like
53°F
Dew Point
53°F
5 AM
53°F
0%
3mph
E
Foggy
Humidity
100%
Feels like
53°F
Dew Point
53°F
6 AM
53°F
0%
3mph
E
Foggy
Humidity
100%
Feels like
53°F
Dew Point
53°F
6:52 AM
7 AM
55°F
0%
3mph
E
Mostly Cloudy
Humidity
98%
Feels like
55°F
Dew Point
54°F
8 AM
56°F
0%
2mph
E
Mostly Cloudy
Humidity
94%
Feels like
56°F
Dew Point
54°F
9 AM
58°F
0%
2mph
ESE
Mostly Cloudy
Humidity
89%
Feels like
58°F
Dew Point
55°F
10 AM
59°F
0%
2mph
SE
Mostly Cloudy
Humidity
84%
Feels like
59°F
Dew Point
55°F
11 AM
61°F
0%
3mph
S
Partly Cloudy
Humidity
80%
Feels like
61°F
Dew Point
55°F
12 PM
63°F
0%
3mph
SSW
Partly Cloudy
Humidity
76%
Feels like
63°F
Dew Point
55°F
1 PM
64°F
0%
4mph
SW
Partly Cloudy
Humidity
73%
Feels like
64°F
Dew Point
55°F
2 PM
65°F
0%
4mph
SW
Partly Cloudy
Humidity
73%
Feels like
65°F
Dew Point
56°F
3 PM
63°F
0%
4mph
SW
Partly Cloudy
Humidity
78%
Feels like
63°F
Dew Point
56°F
4 PM
60°F
0%
4mph
SW
Partly Cloudy
Humidity
87%
Feels like
60°F
Dew Point
56°F
4:46 PM
5 PM
58°F
0%
3mph
SW
Hazy
Humidity
93%
Feels like
58°F
Dew Point
56°F
6 PM
56°F
0%
2mph
SW
Partly Cloudy
Humidity
97%
Feels like
56°F
Dew Point
55°F
7 PM
56°F
0%
2mph
SSW
Foggy
Humidity
99%
Feels like
56°F
Dew Point
55°F
8 PM
55°F
0%
1mph
SSE
Foggy
Humidity
99%
Feels like
55°F
Dew Point
55°F
9 PM
55°F
0%
1mph
ESE
Foggy
Humidity
99%
Feels like
55°F
Dew Point
55°F
10 PM
55°F
0%
2mph
E
Foggy
Humidity
100%
Feels like
55°F
Dew Point
55°F
11 PM
55°F
0%
2mph
E
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

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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