S
M
T
W
T
F
S
31
83°
59°
1
86°
60°
2
83°
53°
3
81°
58°
4
82°
64°
5
84°
66°
6
85°
69°
7
84°
68°
8
82°
68°
9
83°
67°
10
87°
69°
11
85°
68°
12
87°
70°
13
88°
66°
14
86°
68°
15
86°
67°
16
84°
63°
17
81°
67°
18
86°
66°
19
81°
67°
20
86°
67°
21
85°
63°
22
79°
61°
23
82°
68°
24
88°
70°
25
88°
69°
26
87°
68°
27
83°
67°
28
83°
68°
29
85°
68°
30
86°
67°
1
85°
68°
2
84°
69°
3
84°
68°
4
86°
67°
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 79° to 88°, with overnight lows between 58° and 70°. The average high for June is 84° with an average low of 67°. 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.