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
N/A
15
94°
73°
16
89°
70°
17
85°
63°
18
86°
63°
19
87°
64°
20
79°
61°
21
77°
59°
22
79°
60°
23
85°
66°
24
87°
66°
25
85°
64°
26
83°
63°
27
84°
62°
28
79°
59°
29
80°
60°
30
83°
61°
31
86°
66°
1
87°
66°
2
87°
67°
3
86°
66°
4
86°
65°
5
85°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Sullivan
Sullivan's August 2026 forecast shows daily high temperatures ranging from 77° to 94°, with overnight lows between 59° and 73°. The average high for August is 85° 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 August weather will actually feel in Sullivan. See also: September | October | November.
