S
M
T
W
T
F
S
31
76°
52°
1
77°
53°
2
77°
44°
3
82°
55°
4
85°
66°
5
76°
65°
6
80°
55°
7
79°
57°
8
78°
59°
9
80°
60°
10
81°
62°
11
80°
61°
12
82°
61°
13
82°
63°
14
81°
61°
15
81°
61°
16
79°
57°
17
81°
62°
18
82°
61°
19
82°
62°
20
78°
62°
21
78°
55°
22
74°
55°
23
76°
64°
24
83°
65°
25
85°
59°
26
78°
58°
27
76°
61°
28
77°
63°
29
79°
64°
30
80°
64°
1
80°
63°
2
81°
64°
3
84°
65°
4
85°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Sullivan
Sullivan's June 2026 forecast shows daily high temperatures ranging from 74° to 85°, with overnight lows between 55° and 66°. The average high for June is 80° with an average low of 61°. 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 Sullivan. See also: July | August | September.