S
M
T
W
T
F
S
27
71°
49°
28
70°
51°
29
69°
50°
30
65°
58°
1
65°
54°
2
61°
48°
3
60°
41°
4
60°
46°
5
55°
43°
6
61°
55°
7
61°
49°
8
59°
52°
9
57°
43°
10
59°
50°
11
67°
53°
12
60°
48°
13
55°
45°
14
53°
44°
15
54°
47°
16
54°
44°
17
52°
38°
18
59°
45°
19
53°
40°
20
48°
38°
21
51°
43°
22
57°
43°
23
56°
42°
24
49°
42°
25
46°
41°
26
45°
40°
27
45°
38°
28
51°
42°
29
54°
43°
30
53°
42°
31
52°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Mackinac Island
Mackinac Island's October 2026 forecast shows daily high temperatures ranging from 45° to 67°, with overnight lows between 38° and 55°. The average high for October is 55° with an average low of 44°. 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 Mackinac Island. See also: November | December | January.
