S
M
T
W
T
F
S
30
65°
60°
31
66°
59°
1
76°
63°
2
75°
59°
3
76°
58°
4
66°
58°
5
73°
57°
6
74°
55°
7
75°
61°
8
71°
65°
9
74°
57°
10
67°
53°
11
73°
63°
12
71°
57°
13
66°
52°
14
62°
55°
15
64°
54°
16
65°
53°
17
65°
53°
18
64°
54°
19
63°
51°
20
60°
48°
21
62°
54°
22
65°
53°
23
67°
54°
24
68°
55°
25
70°
53°
26
65°
53°
27
66°
52°
28
69°
54°
29
69°
55°
30
68°
55°
1
69°
52°
2
67°
50°
3
57°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in St. Ignace
St. Ignace's September 2026 forecast shows daily high temperatures ranging from 57° to 75°, with overnight lows between 48° and 65°. The average high for September is 67° with an average low of 54°. 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 St. Ignace. See also: October | November | December.
