S
M
T
W
T
F
S
30
71°
62°
31
80°
66°
1
82°
66°
2
77°
59°
3
77°
56°
4
76°
55°
5
76°
57°
6
76°
57°
7
71°
52°
8
71°
54°
9
70°
54°
10
73°
53°
11
67°
51°
12
68°
51°
13
67°
52°
14
69°
48°
15
75°
54°
16
75°
53°
17
71°
52°
18
69°
52°
19
74°
53°
20
74°
53°
21
73°
52°
22
75°
53°
23
74°
52°
24
73°
52°
25
73°
51°
26
74°
52°
27
73°
51°
28
73°
50°
29
70°
49°
30
68°
49°
1
69°
50°
2
71°
50°
3
70°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Alpena
Alpena's September 2026 forecast shows daily high temperatures ranging from 67° to 82°, with overnight lows between 48° and 66°. The average high for September is 73° with an average low of 53°. 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 Alpena. See also: October | November | December.
