FULLERTON, CA 92837 Weather Forecast & Current Conditions

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FULLERTON, CA
Current Weather

12:53 AM PDT SEP 18, 2026
Clear
68°F
Feels Like: 68°F
Dewpoint: 61°F
Rel. Hum.: 78%
Visibility: 10 miles
Wind: Calm
Pressure: 30.05 inches
Last 72 hours

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FULLERTON, CA 92837
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TODAY
Mostly sunny. Highs around 80. Light winds becoming southwest 10 mph this afternoon.
TONIGHT
Mostly clear in the evening...becoming partly cloudy. Lows 56 to 64. Areas of winds west to 10 mph in the evening becoming light.
SATURDAY
Partly cloudy in the morning...becoming sunny. Highs around 80 towards the coast to 82 farther inland. Light winds becoming southwest 10 mph in the afternoon.
SATURDAY NIGHT
Mostly clear in the evening...becoming partly cloudy overnight with patchy fog. Lows 58 to 66. Areas of winds southwest to 10 mph in the evening becoming light.
SUNDAY
Mostly cloudy with patchy fog in the morning...becoming partly cloudy. Highs around 78 towards the coast to 79 to 82 farther inland. Light winds becoming southwest 10 mph in the afternoon.
SUNDAY NIGHT
Partly cloudy. Patchy fog overnight. Lows 57 to 66.
MONDAY
Partly cloudy with patchy fog in the morning...becoming mostly sunny. Highs around 80.
MONDAY NIGHT
Mostly clear. Lows 56 to 65.
TUESDAY
Partly cloudy in the morning...becoming mostly sunny. Highs around 80 towards the coast to 81 farther inland.
TUESDAY NIGHT
Mostly clear. Lows 58 to 66.
WEDNESDAY
Partly cloudy in the morning...becoming mostly sunny. Highs around 82 towards the coast to 84 to 87 farther inland.
WEDNESDAY NIGHT
Mostly clear in the evening...becoming partly cloudy. Lows 60 to 67.
THURSDAY
Partly cloudy in the morning...becoming mostly sunny. Highs around 83 towards the coast to 85 to 88 farther inland.

Visible Weather Satellite
FULLERTON, CA 92837
Infrared Weather Satellite
FULLERTON, CA 92837
NEXRAD Weather Radar
FULLERTON, CA 92837

FULLERTON, CA 3 hourly weather forecast

weather forecast created  8:00 PM EDT  9/17/2026
Friday
18 SEP 2026
FULLERTON, CA 92837 weather forecast Day 1, 0 hours 11 PM 68° 68° Clear 0%

0% Thunder
( 0% severe)
SW   3 78% 61°
Low 64° FULLERTON, CA 92837 weather forecast Day 1, 3 hours 2 AM 67° 67° Partly Cloudy   CALM 81% 61°
High 79° FULLERTON, CA 92837 weather forecast Day 1, 6 hours 5 AM 65° 65° Clear 0%

0% Thunder
( 0% severe)
  CALM 81% 59°

Partly Cloudy



FULLERTON, CA 92837 weather forecast Day 1, 9 hours 8 AM 67° 67° Partly Cloudy   CALM 81% 61°
FULLERTON, CA 92837 weather forecast Day 1, 12 hours 11 AM 73° 73° Partly Cloudy 0%

0% Thunder
( 0% severe)
SW   1 66% 61°
FULLERTON, CA 92837 weather forecast Day 1, 15 hours 2 PM 78° 79° Clear SW   7 54% 60°
FULLERTON, CA 92837 weather forecast Day 1, 18 hours 5 PM 78° 79° Clear 0%

0% Thunder
( 0% severe)
SW   7 52% 59°
FULLERTON, CA 92837 weather forecast Day 1, 21 hours 8 PM 71° 71° Clear   CALM 68% 60°
Saturday
19 SEP 2026
FULLERTON, CA 92837 weather forecast Day 2, 0 hours 11 PM 68° 68° Partly Cloudy 0%

0% Thunder
( 0% severe)
S   1 78% 61°
Low 65° FULLERTON, CA 92837 weather forecast Day 2, 3 hours 2 AM 67° 67° Partly Cloudy ESE   3 81% 61°
High 82° FULLERTON, CA 92837 weather forecast Day 2, 6 hours 5 AM 66° 66° Partly Cloudy 1%

0% Thunder
( 0% severe)
ESE   3 81% 60°

Partly Cloudy



FULLERTON, CA 92837 weather forecast Day 2, 9 hours 8 AM 67° 67° Mostly Cloudy ESE   3 81% 61°
FULLERTON, CA 92837 weather forecast Day 2, 12 hours 11 AM 74° 74° Partly Cloudy 0%

0% Thunder
( 0% severe)
  CALM 64% 61°
FULLERTON, CA 92837 weather forecast Day 2, 15 hours 2 PM 80° 81° Clear SW   6 52% 61°
FULLERTON, CA 92837 weather forecast Day 2, 18 hours 5 PM 80° 81° Clear 0%

0% Thunder
( 0% severe)
SW   7 54% 62°
FULLERTON, CA 92837 weather forecast Day 2, 21 hours 8 PM 73° 73° Clear   CALM 71% 63°

FULLERTON, CA extended weather forecast

Sunday
20 SEP 2026
Monday
21 SEP 2026
Tuesday
22 SEP 2026
Wednesday
23 SEP 2026
Thursday
24 SEP 2026
Low 67° Low 66° Low 64° Low 65° Low 65°
High 82° High 79° High 83° High 81° High 83°
FULLERTON, CA 92837 weather forecast Day 3 FULLERTON, CA 92837 weather forecast Day 4 FULLERTON, CA 92837 weather forecast Day 5 FULLERTON, CA 92837 weather forecast Day 6 FULLERTON, CA 92837 weather forecast Day 7
Mostly Cloudy
1% Rain
Overcast
10% Rain
Partly Cloudy
4% Rain
Mostly Cloudy
1% Rain
Overcast
3% Rain
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