S
M
T
W
T
F
S
26
86°
63°
27
86°
68°
28
83°
68°
29
83°
62°
30
88°
62°
31
88°
63°
1
80°
67°
2
78°
65°
3
82°
61°
4
83°
56°
5
86°
57°
6
86°
68°
7
81°
69°
8
87°
59°
9
83°
68°
10
83°
70°
11
82°
65°
12
81°
64°
13
80°
60°
14
78°
61°
15
78°
62°
16
78°
61°
17
80°
60°
18
80°
63°
19
82°
62°
20
85°
65°
21
84°
65°
22
85°
66°
23
84°
66°
24
85°
65°
25
82°
66°
26
83°
65°
27
82°
64°
28
80°
64°
29
81°
63°
30
80°
64°
31
83°
64°
1
84°
62°
2
78°
59°
3
77°
60°
4
77°
60°
5
82°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Grand Rapids
Grand Rapids's August 2026 forecast shows daily high temperatures ranging from 77° to 87°, with overnight lows between 59° and 70°. The average high for August is 82° with an average low of 64°. 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 Rapids. See also: September | October | November.
