Hourly Weather Forecast - Fullerton, CA

12 AM
59°F
100%
6mph
SE
Rain Showers
Humidity
100%
Feels like
59°F
Dew Point
59°F
1 AM
59°F
100%
6mph
SE
Rain Showers
Humidity
100%
Feels like
59°F
Dew Point
59°F
2 AM
59°F
90%
6mph
SE
Rain Showers
Humidity
100%
Feels like
59°F
Dew Point
59°F
3 AM
60°F
90%
6mph
SE
Light Rain
Humidity
100%
Feels like
60°F
Dew Point
60°F
4 AM
60°F
90%
7mph
SSE
Light Rain
Humidity
100%
Feels like
60°F
Dew Point
60°F
5 AM
60°F
90%
7mph
SSE
Light Rain
Humidity
100%
Feels like
60°F
Dew Point
60°F
6 AM
60°F
90%
8mph
SSE
Light Rain
Humidity
100%
Feels like
60°F
Dew Point
60°F
6:54 AM
7 AM
61°F
90%
8mph
SSE
Rain
Humidity
100%
Feels like
61°F
Dew Point
61°F
8 AM
62°F
90%
9mph
SSE
Rain
Humidity
100%
Feels like
62°F
Dew Point
62°F
9 AM
62°F
90%
9mph
S
Rain
Humidity
100%
Feels like
62°F
Dew Point
62°F
10 AM
62°F
90%
9mph
S
Rain
Humidity
100%
Feels like
62°F
Dew Point
62°F
11 AM
62°F
90%
10mph
S
Rain
Humidity
100%
Feels like
62°F
Dew Point
62°F
12 PM
62°F
90%
9mph
S
Rain Showers
Humidity
97%
Feels like
62°F
Dew Point
61°F
1 PM
62°F
80%
9mph
SSW
80% Chance Rain Showers
Humidity
94%
Feels like
62°F
Dew Point
60°F
2 PM
62°F
80%
8mph
SSW
80% Chance Rain Showers
Humidity
93%
Feels like
62°F
Dew Point
60°F
3 PM
60°F
80%
8mph
SSW
80% Chance Rain Showers
Humidity
97%
Feels like
60°F
Dew Point
59°F
4 PM
58°F
70%
7mph
SSW
70% Chance Rain Showers
Humidity
100%
Feels like
58°F
Dew Point
58°F
4:48 PM
5 PM
57°F
70%
5mph
SSW
70% Chance Rain Showers
Humidity
100%
Feels like
57°F
Dew Point
57°F
6 PM
57°F
80%
4mph
S
80% Chance Rain Showers
Humidity
100%
Feels like
57°F
Dew Point
57°F
7 PM
57°F
70%
4mph
S
70% Chance Rain Showers
Humidity
99%
Feels like
57°F
Dew Point
57°F
8 PM
57°F
70%
4mph
SSE
70% Chance Rain Showers
Humidity
97%
Feels like
57°F
Dew Point
56°F
9 PM
58°F
70%
4mph
SSE
70% Chance Rain Showers
Humidity
95%
Feels like
58°F
Dew Point
56°F
10 PM
58°F
80%
4mph
SE
80% Chance Rain Showers
Humidity
95%
Feels like
58°F
Dew Point
56°F
11 PM
58°F
80%
4mph
SE
80% Chance Rain Showers
Humidity
95%
Feels like
58°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

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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