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
57°F
0%
2mph
ESE
Foggy
Humidity
100%
Feels like
57°F
Dew Point
57°F
3 AM
56°F
0%
2mph
ESE
Foggy
Humidity
100%
Feels like
56°F
Dew Point
56°F
4 AM
56°F
0%
2mph
ESE
Foggy
Humidity
100%
Feels like
56°F
Dew Point
56°F
5 AM
56°F
0%
2mph
ESE
Foggy
Humidity
100%
Feels like
56°F
Dew Point
56°F
6 AM
57°F
0%
2mph
ESE
Foggy
Humidity
100%
Feels like
57°F
Dew Point
57°F
6:53 AM
7 AM
57°F
0%
3mph
ESE
Foggy
Humidity
100%
Feels like
57°F
Dew Point
57°F
8 AM
58°F
0%
3mph
SE
Foggy
Humidity
100%
Feels like
58°F
Dew Point
58°F
9 AM
60°F
0%
3mph
SSE
Partly Cloudy
Humidity
98%
Feels like
60°F
Dew Point
59°F
10 AM
60°F
0%
4mph
SSE
Hazy
Humidity
94%
Feels like
60°F
Dew Point
59°F
11 AM
62°F
10%
5mph
SSE
Partly Cloudy
Humidity
90%
Feels like
62°F
Dew Point
58°F
12 PM
63°F
10%
6mph
SSE
Partly Cloudy
Humidity
86%
Feels like
63°F
Dew Point
59°F
1 PM
64°F
10%
7mph
SSE
Partly Cloudy
Humidity
84%
Feels like
64°F
Dew Point
59°F
2 PM
63°F
10%
8mph
SSE
Partly Cloudy
Humidity
84%
Feels like
63°F
Dew Point
58°F
3 PM
61°F
10%
9mph
SSE
Mostly Cloudy
Humidity
92%
Feels like
61°F
Dew Point
58°F
4 PM
58°F
60%
8mph
SE
60% Chance of Light Rain
Humidity
100%
Feels like
58°F
Dew Point
58°F
4:47 PM
5 PM
56°F
70%
7mph
SE
70% Chance of Light Rain
Humidity
100%
Feels like
56°F
Dew Point
56°F
6 PM
56°F
80%
6mph
SE
80% Chance of Light Rain
Humidity
100%
Feels like
56°F
Dew Point
56°F
7 PM
57°F
80%
6mph
ESE
80% Chance of Light Rain
Humidity
98%
Feels like
57°F
Dew Point
56°F
8 PM
58°F
90%
6mph
ESE
Rain
Humidity
95%
Feels like
58°F
Dew Point
56°F
9 PM
58°F
90%
7mph
ESE
Rain
Humidity
95%
Feels like
58°F
Dew Point
57°F
10 PM
59°F
90%
8mph
SE
Rain
Humidity
96%
Feels like
59°F
Dew Point
58°F
11 PM
59°F
100%
9mph
SE
Light Rain
Humidity
98%
Feels like
59°F
Dew Point
59°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

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide