S
M
T
W
T
F
S
30
69°
56°
31
73°
63°
1
83°
55°
2
76°
53°
3
76°
50°
4
66°
60°
5
75°
56°
6
75°
54°
7
81°
60°
8
72°
61°
9
72°
62°
10
70°
50°
11
81°
50°
12
68°
57°
13
60°
41°
14
65°
36°
15
66°
48°
16
67°
43°
17
67°
48°
18
59°
48°
19
64°
41°
20
57°
36°
21
58°
44°
22
59°
35°
23
62°
39°
24
65°
39°
25
71°
44°
26
68°
47°
27
63°
51°
28
67°
54°
29
68°
55°
30
68°
54°
1
63°
49°
2
60°
46°
3
61°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Calumet
Calumet's September 2026 forecast shows daily high temperatures ranging from 60° to 68°, with overnight lows between 46° and 55°. The average high for September is 65° with an average low of 51°. 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 Calumet. See also: October | November | December.