S
M
T
W
T
F
S
26
79°
63°
27
82°
64°
28
80°
67°
29
79°
64°
30
80°
60°
31
85°
59°
1
87°
66°
2
74°
64°
3
79°
61°
4
80°
57°
5
87°
60°
6
84°
71°
7
80°
70°
8
82°
67°
9
81°
60°
10
80°
66°
11
81°
65°
12
78°
61°
13
84°
62°
14
81°
60°
15
81°
62°
16
77°
64°
17
76°
59°
18
78°
66°
19
79°
66°
20
75°
61°
21
76°
60°
22
76°
62°
23
77°
61°
24
77°
60°
25
76°
61°
26
77°
60°
27
80°
65°
28
74°
59°
29
75°
63°
30
79°
64°
31
81°
63°
1
82°
64°
2
82°
64°
3
81°
63°
4
78°
62°
5
76°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Grand Island
Grand Island's August 2026 forecast shows daily high temperatures ranging from 74° to 84°, with overnight lows between 59° and 66°. The average high for August is 78° 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 Grand Island. See also: September | October | November.
