S
M
T
W
T
F
S
30
71°
51°
31
72°
58°
1
76°
59°
2
70°
59°
3
79°
58°
4
79°
56°
5
78°
55°
6
73°
49°
7
69°
51°
8
75°
56°
9
76°
54°
10
76°
55°
11
72°
48°
12
71°
55°
13
73°
55°
14
76°
48°
15
67°
53°
16
66°
52°
17
65°
53°
18
66°
50°
19
71°
44°
20
66°
51°
21
69°
45°
22
68°
48°
23
69°
45°
24
72°
46°
25
71°
52°
26
71°
51°
27
69°
53°
28
70°
50°
29
70°
42°
30
62°
47°
1
68°
51°
2
70°
47°
3
68°
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 62° to 79°, with overnight lows between 42° and 59°. The average high for September is 71° 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 Coal City. See also: October | November | December.
