S
M
T
W
T
F
S
30
52°
40°
31
49°
39°
1
51°
36°
2
51°
47°
3
58°
51°
4
59°
50°
5
57°
47°
6
56°
49°
7
56°
51°
8
56°
48°
9
51°
42°
10
54°
49°
11
55°
43°
12
50°
44°
13
46°
32°
14
42°
31°
15
41°
32°
16
49°
45°
17
46°
44°
18
50°
45°
19
50°
44°
20
49°
44°
21
47°
42°
22
44°
42°
23
44°
40°
24
46°
38°
25
48°
39°
26
47°
41°
27
46°
41°
28
50°
40°
29
49°
40°
30
49°
39°
1
43°
37°
2
40°
35°
3
38°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in St. Michael
St. Michael's September 2026 forecast shows daily high temperatures ranging from 38° to 59°, with overnight lows between 31° and 51°. The average high for September is 49° with an average low of 42°. 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. Michael. See also: October | November | December.
