S
M
T
W
T
F
S
26
79°
59°
27
82°
61°
28
79°
66°
29
73°
63°
30
79°
54°
31
81°
54°
1
82°
59°
2
77°
66°
3
78°
58°
4
83°
63°
5
84°
64°
6
84°
66°
7
85°
65°
8
82°
64°
9
83°
66°
10
82°
63°
11
80°
62°
12
77°
59°
13
79°
58°
14
77°
57°
15
76°
55°
16
76°
54°
17
84°
61°
18
83°
61°
19
83°
60°
20
81°
58°
21
79°
54°
22
81°
61°
23
84°
61°
24
84°
62°
25
81°
61°
26
82°
61°
27
81°
60°
28
82°
60°
29
81°
59°
30
80°
60°
31
80°
59°
1
82°
55°
2
74°
51°
3
73°
51°
4
74°
52°
5
75°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Indiana
Indiana's August 2026 forecast shows daily high temperatures ranging from 73° to 85°, with overnight lows between 51° and 66°. The average high for August is 80° with an average low of 59°. 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 Indiana. See also: September | October | November.
