S
M
T
W
T
F
S
26
86°
67°
27
92°
71°
28
86°
66°
29
85°
61°
30
85°
61°
31
81°
63°
1
78°
68°
2
82°
66°
3
84°
62°
4
87°
59°
5
86°
58°
6
79°
66°
7
89°
66°
8
90°
70°
9
88°
68°
10
92°
74°
11
92°
70°
12
86°
71°
13
91°
71°
14
89°
71°
15
85°
72°
16
89°
73°
17
84°
65°
18
86°
61°
19
84°
64°
20
84°
66°
21
85°
62°
22
84°
60°
23
82°
55°
24
79°
52°
25
84°
52°
26
90°
60°
27
85°
61°
28
87°
58°
29
88°
55°
30
93°
58°
31
97°
66°
1
99°
67°
2
99°
69°
3
99°
69°
4
100°
69°
5
100°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Sullivan
Sullivan's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Sullivan. See also: September | October | November.
