S
M
T
W
T
F
S
26
65°
58°
27
75°
57°
28
75°
58°
29
74°
50°
30
73°
49°
31
67°
48°
1
64°
48°
2
66°
54°
3
73°
56°
4
74°
57°
5
73°
56°
6
75°
57°
7
75°
59°
8
76°
57°
9
76°
52°
10
73°
50°
11
67°
53°
12
63°
49°
13
64°
46°
14
62°
53°
15
69°
54°
16
68°
55°
17
71°
53°
18
71°
55°
19
72°
55°
20
72°
50°
21
63°
55°
22
70°
46°
23
66°
45°
24
61°
44°
25
62°
47°
26
62°
47°
27
63°
50°
28
63°
47°
29
62°
53°
30
65°
52°
31
62°
50°
1
59°
43°
2
64°
52°
3
65°
51°
4
67°
51°
5
65°
52°
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 59° to 76°, with overnight lows between 43° and 59°. The average high for August is 68° with an average low of 52°. 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.
