S
M
T
W
T
F
S
29
69°
48°
30
74°
59°
31
81°
54°
1
82°
55°
2
84°
54°
3
82°
59°
4
84°
58°
5
66°
49°
6
69°
41°
7
73°
37°
8
N/A
9
72°
41°
10
77°
46°
11
79°
52°
12
85°
55°
13
82°
54°
14
83°
56°
15
84°
59°
16
81°
55°
17
81°
54°
18
79°
54°
19
83°
57°
20
81°
55°
21
77°
46°
22
75°
53°
23
77°
52°
24
78°
54°
25
76°
53°
26
75°
52°
27
75°
52°
28
78°
53°
29
78°
54°
30
77°
54°
1
78°
55°
2
78°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
April Weather in Fullerton
Fullerton's April 2026 forecast shows daily high temperatures ranging from 72° to 85°, with overnight lows between 41° and 59°. The average high for April is 79° with an average low of 53°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in Fullerton. See also: May | June | July.
