Hourly Weather Forecast - Fullerton, CA

12 AM
56°F
0%
2mph
E
Foggy
Humidity
100%
Feels like
56°F
Dew Point
56°F
1 AM
56°F
0%
2mph
E
Foggy
Humidity
100%
Feels like
56°F
Dew Point
56°F
2 AM
56°F
0%
2mph
E
Foggy
Humidity
100%
Feels like
56°F
Dew Point
56°F
3 AM
55°F
0%
2mph
E
Foggy
Humidity
100%
Feels like
55°F
Dew Point
55°F
4 AM
55°F
10%
2mph
E
Foggy
Humidity
100%
Feels like
55°F
Dew Point
55°F
5 AM
55°F
10%
2mph
E
Foggy
Humidity
100%
Feels like
55°F
Dew Point
55°F
6 AM
56°F
10%
3mph
E
Foggy
Humidity
100%
Feels like
56°F
Dew Point
56°F
6:53 AM
7 AM
57°F
10%
3mph
E
Foggy
Humidity
100%
Feels like
57°F
Dew Point
57°F
8 AM
58°F
10%
3mph
ESE
Foggy
Humidity
100%
Feels like
58°F
Dew Point
58°F
9 AM
59°F
10%
3mph
SE
Partly Cloudy
Humidity
97%
Feels like
59°F
Dew Point
58°F
10 AM
60°F
10%
3mph
SSE
Partly Cloudy
Humidity
92%
Feels like
60°F
Dew Point
58°F
11 AM
61°F
10%
5mph
SSE
Partly Cloudy
Humidity
88%
Feels like
61°F
Dew Point
58°F
12 PM
62°F
10%
6mph
SSE
Mostly Cloudy
Humidity
84%
Feels like
62°F
Dew Point
57°F
1 PM
63°F
20%
7mph
SSE
Cloudy
Humidity
81%
Feels like
63°F
Dew Point
57°F
2 PM
63°F
30%
8mph
SSE
30% Chance of Light Rain
Humidity
82%
Feels like
63°F
Dew Point
57°F
3 PM
61°F
40%
8mph
SSE
40% Chance of Light Rain
Humidity
88%
Feels like
61°F
Dew Point
57°F
4 PM
58°F
50%
7mph
SE
50% Chance of Light Rain
Humidity
96%
Feels like
58°F
Dew Point
57°F
4:47 PM
5 PM
57°F
50%
7mph
SE
50% Chance of Light Rain
Humidity
99%
Feels like
57°F
Dew Point
56°F
6 PM
57°F
60%
7mph
SE
60% Chance of Light Rain
Humidity
98%
Feels like
57°F
Dew Point
56°F
7 PM
57°F
60%
6mph
SE
60% Chance of Light Rain
Humidity
96%
Feels like
57°F
Dew Point
56°F
8 PM
58°F
60%
7mph
SE
60% Chance of Light Rain
Humidity
94%
Feels like
58°F
Dew Point
56°F
9 PM
58°F
70%
7mph
ESE
70% Chance of Light Rain
Humidity
93%
Feels like
58°F
Dew Point
56°F
10 PM
58°F
70%
8mph
ESE
70% Chance of Rain
Humidity
94%
Feels like
58°F
Dew Point
56°F
11 PM
59°F
70%
9mph
ESE
70% Chance of Rain
Humidity
95%
Feels like
59°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

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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