S
M
T
W
T
F
S
31
63°
41°
1
60°
44°
2
61°
43°
3
68°
48°
4
76°
52°
5
74°
52°
6
70°
53°
7
71°
53°
8
68°
51°
9
71°
50°
10
73°
51°
11
69°
54°
12
69°
54°
13
74°
53°
14
76°
54°
15
71°
53°
16
74°
54°
17
77°
56°
18
77°
52°
19
70°
52°
20
75°
56°
21
78°
56°
22
78°
55°
23
77°
57°
24
72°
57°
25
73°
56°
26
73°
52°
27
71°
51°
28
73°
56°
29
73°
57°
30
76°
53°
1
73°
58°
2
73°
59°
3
74°
55°
4
73°
54°
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 60° to 78°, with overnight lows between 41° and 59°. The average high for June is 72° with an average low of 53°. 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.