S
M
T
W
T
F
S
30
80°
52°
31
80°
52°
1
79°
51°
2
78°
51°
3
71°
45°
4
70°
50°
5
69°
50°
6
69°
46°
7
70°
44°
8
69°
42°
9
70°
44°
10
72°
47°
11
71°
47°
12
72°
46°
13
72°
46°
14
69°
44°
15
66°
44°
16
66°
38°
17
65°
42°
18
69°
43°
19
70°
42°
20
65°
38°
21
64°
40°
22
65°
40°
23
69°
43°
24
68°
39°
25
67°
40°
26
68°
40°
27
69°
41°
28
70°
39°
29
66°
33°
30
64°
41°
1
66°
43°
2
64°
38°
3
58°
35°
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 80°, with overnight lows between 33° and 52°. The average high for September is 69° with an average low of 43°. 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.
