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
80°
59°
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
77°
52°
21
74°
54°
22
72°
51°
23
74°
55°
24
71°
47°
25
76°
52°
26
79°
55°
27
79°
56°
28
78°
55°
29
73°
53°
30
70°
47°
31
71°
52°
1
69°
51°
2
69°
47°
3
70°
46°
4
72°
51°
5
69°
47°
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 69° to 86°, with overnight lows between 46° and 59°. The average high for August is 76° with an average low of 53°. 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.
