S
M
T
W
T
F
S
31
72°
63°
1
77°
62°
2
80°
63°
3
79°
62°
4
80°
64°
5
78°
64°
6
80°
65°
7
81°
62°
8
81°
58°
9
76°
57°
10
75°
61°
11
78°
61°
12
81°
60°
13
80°
61°
14
80°
64°
15
82°
65°
16
83°
65°
17
83°
64°
18
82°
65°
19
83°
64°
20
83°
67°
21
84°
68°
22
83°
67°
23
84°
66°
24
85°
67°
25
85°
68°
26
84°
68°
27
86°
67°
28
86°
67°
29
85°
66°
30
85°
67°
1
83°
66°
2
84°
65°
3
84°
64°
4
83°
64°
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 72° to 86°, with overnight lows between 57° and 68°. The average high for June is 82° with an average low of 64°. 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.
