S
M
T
W
T
F
S
26
91°
73°
27
90°
72°
28
95°
73°
29
88°
70°
30
86°
64°
31
88°
61°
1
88°
68°
2
79°
68°
3
82°
65°
4
85°
64°
5
86°
67°
6
92°
69°
7
90°
71°
8
89°
71°
9
90°
72°
10
91°
70°
11
91°
71°
12
91°
70°
13
90°
71°
14
90°
70°
15
89°
67°
16
85°
64°
17
92°
71°
18
92°
71°
19
93°
70°
20
93°
71°
21
92°
70°
22
92°
70°
23
91°
71°
24
91°
70°
25
90°
70°
26
91°
69°
27
90°
69°
28
90°
68°
29
91°
69°
30
90°
68°
31
90°
69°
1
91°
68°
2
91°
68°
3
90°
67°
4
89°
68°
5
89°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Shelbyville
Shelbyville's August 2026 forecast shows daily high temperatures ranging from 79° to 93°, with overnight lows between 64° and 72°. The average high for August is 90° with an average low of 69°. 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 Shelbyville. See also: September | October | November.