S
M
T
W
T
F
S
26
70°
59°
27
78°
58°
28
71°
57°
29
71°
54°
30
74°
53°
31
79°
56°
1
66°
56°
2
68°
55°
3
71°
52°
4
74°
56°
5
81°
55°
6
82°
57°
7
82°
58°
8
80°
55°
9
79°
53°
10
79°
57°
11
80°
57°
12
78°
54°
13
82°
56°
14
86°
57°
15
82°
56°
16
80°
55°
17
77°
54°
18
79°
55°
19
78°
56°
20
79°
55°
21
77°
52°
22
72°
51°
23
74°
55°
24
80°
56°
25
81°
56°
26
80°
55°
27
79°
56°
28
78°
53°
29
76°
54°
30
72°
53°
31
75°
54°
1
75°
55°
2
70°
53°
3
75°
54°
4
79°
54°
5
79°
55°
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 70° to 86°, with overnight lows between 51° and 57°. The average high for August is 78° with an average low of 55°. 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.
