S
M
T
W
T
F
S
31
78°
56°
1
72°
54°
2
73°
53°
3
71°
52°
4
73°
52°
5
74°
60°
6
79°
61°
7
82°
62°
8
81°
63°
9
82°
62°
10
82°
55°
11
74°
54°
12
75°
55°
13
76°
58°
14
77°
55°
15
75°
55°
16
76°
56°
17
77°
56°
18
77°
57°
19
82°
64°
20
86°
64°
21
83°
61°
22
80°
58°
23
86°
66°
24
87°
66°
25
86°
65°
26
82°
60°
27
82°
60°
28
83°
64°
29
86°
59°
30
82°
60°
1
83°
64°
2
86°
67°
3
89°
67°
4
88°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Fullerton
Fullerton's June 2026 forecast shows daily high temperatures ranging from 71° to 89°, with overnight lows between 52° and 67°. The average high for June is 80° with an average low of 60°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in Fullerton. See also: July | August | September.
