S
M
T
W
T
F
S
26
103°
73°
27
97°
72°
28
91°
70°
29
86°
70°
30
87°
68°
31
84°
65°
1
85°
60°
2
90°
65°
3
94°
67°
4
76°
59°
5
73°
57°
6
83°
62°
7
88°
64°
8
94°
68°
9
98°
69°
10
100°
68°
11
101°
66°
12
91°
67°
13
89°
65°
14
88°
64°
15
91°
71°
16
90°
70°
17
93°
72°
18
92°
71°
19
92°
70°
20
91°
70°
21
92°
69°
22
92°
69°
23
89°
68°
24
89°
68°
25
91°
67°
26
86°
66°
27
89°
66°
28
91°
67°
29
90°
66°
30
91°
67°
31
91°
67°
1
90°
68°
2
91°
68°
3
91°
67°
4
90°
67°
5
90°
66°
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 73° to 101°, with overnight lows between 57° and 72°. The average high for August is 90° with an average low of 67°. 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.
