S
M
T
W
T
F
S
30
77°
47°
31
73°
45°
1
70°
48°
2
71°
45°
3
70°
47°
4
71°
46°
5
70°
47°
6
70°
50°
7
71°
50°
8
70°
48°
9
71°
46°
10
70°
47°
11
68°
50°
12
70°
51°
13
69°
50°
14
72°
47°
15
70°
49°
16
74°
44°
17
73°
49°
18
74°
49°
19
66°
45°
20
74°
48°
21
Hist. Avg.
69°
45°
22
Hist. Avg.
69°
45°
23
Hist. Avg.
68°
45°
24
Hist. Avg.
68°
44°
25
Hist. Avg.
67°
44°
26
Hist. Avg.
67°
44°
27
Hist. Avg.
66°
43°
28
Hist. Avg.
66°
43°
29
Hist. Avg.
65°
43°
30
Hist. Avg.
65°
42°
1
Hist. Avg.
64°
42°
2
Hist. Avg.
64°
42°
3
Hist. Avg.
64°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Alpena
Alpena's September 2026 forecast shows daily high temperatures ranging from 66° to 77°, with overnight lows between 44° and 51°. The average high for September is 71° with an average low of 48°. 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.
