S
M
T
W
T
F
S
27
73°
41°
28
74°
42°
29
75°
46°
30
67°
52°
1
79°
61°
2
66°
48°
3
64°
44°
4
71°
44°
5
63°
36°
6
61°
43°
7
68°
48°
8
73°
47°
9
68°
44°
10
70°
52°
11
73°
46°
12
65°
46°
13
63°
43°
14
63°
42°
15
66°
39°
16
61°
38°
17
66°
44°
18
65°
43°
19
59°
39°
20
58°
37°
21
54°
40°
22
54°
37°
23
60°
40°
24
56°
39°
25
51°
37°
26
50°
36°
27
50°
33°
28
52°
38°
29
60°
42°
30
61°
41°
31
61°
42°
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 50° to 73°, with overnight lows between 33° and 52°. The average high for October is 62° 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.