S
M
T
W
T
F
S
26
91°
74°
27
94°
65°
28
92°
67°
29
94°
73°
30
99°
70°
31
100°
72°
1
96°
71°
2
99°
69°
3
99°
66°
4
92°
65°
5
92°
66°
6
93°
67°
7
92°
70°
8
92°
72°
9
97°
72°
10
95°
71°
11
99°
73°
12
99°
74°
13
98°
72°
14
99°
72°
15
98°
70°
16
92°
72°
17
98°
72°
18
98°
68°
19
96°
66°
20
90°
65°
21
91°
66°
22
96°
63°
23
89°
67°
24
90°
70°
25
94°
72°
26
95°
72°
27
96°
71°
28
96°
71°
29
97°
70°
30
96°
70°
31
94°
69°
1
94°
69°
2
93°
66°
3
93°
68°
4
86°
70°
5
93°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Indianapolis
Indianapolis's August 2026 forecast shows daily high temperatures ranging from 86° to 100°, with overnight lows between 63° and 74°. The average high for August is 95° 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 Indianapolis. See also: September | October | November.
