S
M
T
W
T
F
S
31
79°
60°
1
80°
58°
2
78°
59°
3
80°
58°
4
81°
61°
5
76°
61°
6
76°
63°
7
75°
62°
8
75°
62°
9
80°
63°
10
84°
63°
11
83°
64°
12
81°
64°
13
80°
65°
14
79°
62°
15
82°
66°
16
82°
65°
17
83°
67°
18
83°
66°
19
82°
66°
20
82°
65°
21
83°
66°
22
83°
67°
23
84°
67°
24
84°
66°
25
83°
67°
26
84°
66°
27
83°
65°
28
82°
63°
29
81°
63°
30
83°
64°
1
83°
66°
2
84°
68°
3
85°
68°
4
85°
67°
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 75° to 85°, with overnight lows between 58° and 68°. The average high for June is 81° 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.
