S
M
T
W
T
F
S
31
79°
60°
1
77°
62°
2
77°
62°
3
79°
63°
4
76°
63°
5
75°
64°
6
75°
64°
7
77°
64°
8
78°
64°
9
79°
62°
10
80°
63°
11
82°
65°
12
92°
66°
13
82°
62°
14
86°
62°
15
83°
62°
16
83°
63°
17
82°
65°
18
77°
64°
19
77°
63°
20
77°
61°
21
76°
62°
22
77°
63°
23
80°
64°
24
83°
67°
25
86°
66°
26
81°
64°
27
84°
68°
28
85°
67°
29
85°
68°
30
84°
68°
1
85°
67°
2
83°
67°
3
85°
68°
4
86°
69°
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 76° to 86°, with overnight lows between 61° and 69°. The average high for June is 82° with an average low of 65°. 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.
