S
M
T
W
T
F
S
30
79°
50°
31
82°
51°
1
85°
49°
2
83°
45°
3
78°
49°
4
79°
44°
5
77°
43°
6
78°
43°
7
79°
45°
8
78°
43°
9
77°
42°
10
76°
41°
11
77°
42°
12
79°
44°
13
82°
42°
14
82°
39°
15
75°
38°
16
74°
38°
17
75°
39°
18
76°
39°
19
79°
41°
20
79°
39°
21
80°
41°
22
81°
44°
23
82°
43°
24
80°
43°
25
79°
42°
26
79°
41°
27
78°
42°
28
79°
43°
29
77°
41°
30
70°
40°
1
71°
41°
2
71°
39°
3
74°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in St. Michaels
St. Michaels's September 2026 forecast shows daily high temperatures ranging from 70° to 85°, with overnight lows between 38° and 51°. The average high for September is 78° 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. Michaels. See also: October | November | December.