S
M
T
W
T
F
S
30
69°
54°
31
70°
52°
1
79°
55°
2
81°
53°
3
83°
49°
4
86°
53°
5
86°
57°
6
82°
51°
7
80°
53°
8
83°
51°
9
81°
50°
10
83°
48°
11
87°
58°
12
88°
54°
13
89°
56°
14
84°
53°
15
83°
52°
16
71°
58°
17
72°
58°
18
67°
45°
19
66°
42°
20
68°
45°
21
68°
50°
22
62°
46°
23
69°
43°
24
69°
44°
25
71°
47°
26
70°
44°
27
70°
43°
28
70°
44°
29
68°
43°
30
69°
38°
1
66°
37°
2
58°
33°
3
60°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Altonah
Altonah's September 2026 forecast shows daily high temperatures ranging from 58° to 71°, with overnight lows between 33° and 50°. The average high for September is 67° 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 Altonah. See also: October | November | December.
