S
M
T
W
T
F
S
30
78°
64°
31
86°
70°
1
92°
75°
2
91°
73°
3
90°
73°
4
88°
73°
5
81°
68°
6
77°
59°
7
79°
55°
8
82°
61°
9
77°
66°
10
75°
61°
11
78°
67°
12
80°
69°
13
75°
62°
14
79°
71°
15
79°
61°
16
71°
63°
17
69°
59°
18
70°
60°
19
69°
57°
20
66°
59°
21
68°
58°
22
69°
59°
23
62°
46°
24
75°
58°
25
69°
58°
26
75°
59°
27
75°
59°
28
74°
58°
29
74°
59°
30
72°
56°
1
71°
54°
2
67°
57°
3
71°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Michigan City
Michigan City's September 2026 forecast shows daily high temperatures ranging from 62° to 80°, with overnight lows between 46° and 71°. The average high for September is 72° with an average low of 59°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Michigan City. See also: October | November | December.
