S
M
T
W
T
F
S
26
81°
66°
27
82°
63°
28
83°
66°
29
86°
65°
30
87°
62°
31
82°
61°
1
81°
60°
2
81°
60°
3
80°
61°
4
80°
59°
5
81°
61°
6
81°
62°
7
82°
65°
8
83°
65°
9
85°
61°
10
83°
64°
11
85°
68°
12
88°
68°
13
89°
60°
14
83°
63°
15
81°
67°
16
83°
64°
17
86°
60°
18
79°
59°
19
80°
58°
20
79°
61°
21
81°
58°
22
77°
57°
23
78°
59°
24
78°
59°
25
80°
66°
26
82°
67°
27
84°
67°
28
87°
58°
29
87°
64°
30
82°
59°
31
77°
61°
1
77°
64°
2
78°
55°
3
76°
55°
4
76°
63°
5
77°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Granger
Granger's August 2026 forecast shows daily high temperatures ranging from 76° to 89°, with overnight lows between 55° and 68°. The average high for August is 82° with an average low of 62°. 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 Granger. See also: September | October | November.