S
M
T
W
T
F
S
30
76°
57°
31
77°
61°
1
76°
63°
2
80°
56°
3
76°
52°
4
74°
54°
5
73°
53°
6
74°
55°
7
80°
57°
8
81°
61°
9
81°
60°
10
80°
53°
11
75°
59°
12
76°
57°
13
75°
51°
14
73°
52°
15
71°
51°
16
72°
50°
17
73°
57°
18
76°
48°
19
72°
51°
20
72°
49°
21
75°
51°
22
72°
56°
23
77°
57°
24
78°
56°
25
74°
56°
26
77°
55°
27
77°
56°
28
78°
54°
29
77°
54°
30
75°
55°
1
77°
53°
2
77°
45°
3
75°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Coal City
Coal City's September 2026 forecast shows daily high temperatures ranging from 71° to 81°, with overnight lows between 43° and 63°. The average high for September is 76° with an average low of 54°. 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 Coal City. See also: October | November | December.
