Hourly Weather Forecast - Fullerton, CA

12 PM
62°F
0%
3mph
SSW
Partly Cloudy
Humidity
77%
Feels like
62°F
Dew Point
55°F
1 PM
64°F
0%
4mph
SW
Mostly Sunny
Humidity
73%
Feels like
64°F
Dew Point
55°F
2 PM
64°F
0%
4mph
SW
Mostly Sunny
Humidity
73%
Feels like
64°F
Dew Point
55°F
3 PM
62°F
0%
4mph
SW
Mostly Sunny
Humidity
79%
Feels like
62°F
Dew Point
55°F
4 PM
59°F
0%
4mph
SW
Mostly Sunny
Humidity
89%
Feels like
59°F
Dew Point
56°F
4:46 PM
5 PM
57°F
0%
3mph
SW
Hazy
Humidity
95%
Feels like
57°F
Dew Point
55°F
6 PM
55°F
0%
2mph
SW
Foggy
Humidity
99%
Feels like
55°F
Dew Point
55°F
7 PM
55°F
0%
2mph
SSW
Foggy
Humidity
100%
Feels like
55°F
Dew Point
55°F
8 PM
55°F
0%
2mph
SSE
Foggy
Humidity
99%
Feels like
55°F
Dew Point
55°F
9 PM
55°F
0%
2mph
ESE
Foggy
Humidity
100%
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
ENE
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

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide