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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Fullerton, CA
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April
Average Temperature
High
23°
Feels 23
Low
11°
Feels 11
Average Precipitation
2 Days
Rain amount
6.9mm
Snow amount
0cm
Content continues below
Daily Historical Averages
April 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
21°
22
21°
23
25°
24
24°
25
19°
26
20°
27
22°
28
22°
29
24°
30
25°
Forecast
Tuesday, April 21, 2026
Day
21°
Feels 21
Wind
16 km/h SW
Gust
24 km/h
Humidity
46%
P.O.P
40%
Rain
<1 mm
Night
13°
Feels 13
Wind
14 km/h W
Gust
21 km/h
Humidity
87%
P.O.P
0%
Historical Averages
Apr 21
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.