S
M
T
W
T
F
S
31
76°
41°
1
76°
52°
2
77°
44°
3
84°
50°
4
87°
50°
5
91°
54°
6
90°
60°
7
83°
62°
8
77°
57°
9
83°
50°
10
83°
66°
11
93°
71°
12
92°
70°
13
88°
64°
14
90°
60°
15
75°
58°
16
76°
49°
17
82°
51°
18
87°
71°
19
82°
63°
20
83°
62°
21
84°
55°
22
73°
62°
23
75°
61°
24
82°
54°
25
84°
55°
26
82°
65°
27
71°
66°
28
81°
62°
29
88°
65°
30
91°
67°
1
100°
74°
2
105°
76°
3
104°
74°
4
99°
71°
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 81° to 105°, with overnight lows between 62° and 76°. The average high for June is 95° with an average low of 70°. 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.
