S
M
T
W
T
F
S
26
69°
60°
27
75°
63°
28
73°
63°
29
70°
62°
30
72°
56°
31
68°
55°
1
68°
55°
2
70°
59°
3
73°
62°
4
73°
62°
5
72°
61°
6
69°
62°
7
73°
61°
8
75°
62°
9
75°
59°
10
74°
53°
11
68°
54°
12
69°
56°
13
68°
54°
14
68°
54°
15
69°
57°
16
69°
60°
17
66°
59°
18
68°
57°
19
68°
57°
20
69°
54°
21
73°
60°
22
74°
60°
23
68°
59°
24
71°
59°
25
72°
52°
26
67°
52°
27
66°
53°
28
66°
55°
29
64°
58°
30
66°
59°
31
65°
58°
1
67°
52°
2
65°
52°
3
64°
54°
4
65°
51°
5
67°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Index
Index's August 2026 forecast shows daily high temperatures ranging from 64° to 75°, with overnight lows between 51° and 63°. The average high for August is 69° with an average low of 57°. 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 Index. See also: September | October | November.
