S
M
T
W
T
F
S
26
82°
64°
27
85°
64°
28
85°
63°
29
84°
64°
30
81°
61°
31
78°
57°
1
78°
62°
2
84°
64°
3
86°
65°
4
86°
65°
5
87°
64°
6
86°
62°
7
82°
62°
8
83°
60°
9
83°
54°
10
79°
53°
11
77°
57°
12
78°
55°
13
78°
55°
14
79°
56°
15
77°
58°
16
78°
59°
17
82°
59°
18
80°
57°
19
78°
55°
20
80°
61°
21
80°
61°
22
81°
60°
23
81°
60°
24
82°
59°
25
83°
59°
26
81°
60°
27
83°
56°
28
83°
54°
29
80°
58°
30
77°
55°
31
78°
52°
1
77°
53°
2
75°
50°
3
74°
49°
4
75°
50°
5
75°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Grass Lake
Grass Lake's August 2026 forecast shows daily high temperatures ranging from 74° to 87°, with overnight lows between 49° and 65°. The average high for August is 81° with an average low of 58°. 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 Grass Lake. See also: September | October | November.
