S
M
T
W
T
F
S
26
84°
67°
27
78°
62°
28
79°
64°
29
82°
66°
30
81°
62°
31
81°
66°
1
81°
62°
2
81°
59°
3
80°
60°
4
77°
58°
5
78°
59°
6
78°
59°
7
79°
60°
8
80°
60°
9
83°
64°
10
78°
65°
11
81°
66°
12
84°
67°
13
84°
68°
14
83°
63°
15
84°
59°
16
82°
61°
17
78°
65°
18
77°
60°
19
78°
58°
20
76°
58°
21
77°
61°
22
79°
62°
23
83°
65°
24
84°
66°
25
83°
58°
26
84°
57°
27
76°
58°
28
76°
58°
29
77°
64°
30
80°
65°
31
83°
65°
1
83°
57°
2
79°
58°
3
82°
62°
4
76°
63°
5
76°
62°
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 76° to 84°, with overnight lows between 57° and 68°. The average high for August is 80° with an average low of 62°. 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.
