S
M
T
W
T
F
S
27
73°
41°
28
74°
42°
29
75°
46°
30
67°
52°
1
79°
61°
2
66°
46°
3
65°
40°
4
72°
43°
5
63°
39°
6
68°
36°
7
75°
48°
8
68°
42°
9
68°
50°
10
78°
57°
11
63°
55°
12
72°
48°
13
62°
42°
14
55°
37°
15
59°
40°
16
57°
39°
17
59°
42°
18
61°
42°
19
60°
39°
20
61°
37°
21
54°
40°
22
54°
37°
23
51°
33°
24
54°
39°
25
60°
41°
26
62°
38°
27
61°
31°
28
49°
29°
29
49°
35°
30
52°
37°
31
60°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Grass Lake
Grass Lake's October 2026 forecast shows daily high temperatures ranging from 49° to 78°, with overnight lows between 29° and 57°. The average high for October is 60° with an average low of 41°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Grass Lake. See also: November | December | January.