S
M
T
W
T
F
S
26
79°
69°
27
79°
70°
28
83°
71°
29
84°
71°
30
82°
70°
31
80°
71°
1
81°
70°
2
82°
71°
3
82°
71°
4
84°
70°
5
79°
68°
6
81°
71°
7
85°
70°
8
78°
65°
9
77°
63°
10
77°
65°
11
78°
70°
12
78°
69°
13
82°
71°
14
84°
71°
15
84°
69°
16
78°
67°
17
78°
60°
18
79°
61°
19
82°
69°
20
85°
68°
21
83°
69°
22
84°
68°
23
83°
65°
24
78°
63°
25
78°
66°
26
79°
61°
27
77°
63°
28
78°
64°
29
80°
65°
30
84°
64°
31
84°
67°
1
83°
67°
2
83°
66°
3
82°
58°
4
76°
57°
5
75°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Grand River
Grand River's August 2026 forecast shows daily high temperatures ranging from 75° to 85°, with overnight lows between 57° and 71°. The average high for August is 81° 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 River. See also: September | October | November.
