S
M
T
W
T
F
S
30
87°
66°
31
87°
66°
1
88°
68°
2
91°
68°
3
91°
69°
4
91°
70°
5
83°
68°
6
82°
66°
7
79°
64°
8
83°
60°
9
84°
64°
10
75°
69°
11
79°
67°
12
81°
66°
13
82°
62°
14
77°
58°
15
82°
61°
16
82°
63°
17
83°
64°
18
76°
60°
19
71°
54°
20
69°
51°
21
68°
50°
22
71°
52°
23
71°
54°
24
74°
52°
25
75°
55°
26
75°
56°
27
74°
56°
28
75°
55°
29
74°
55°
30
75°
57°
1
73°
53°
2
69°
50°
3
73°
54°
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 68° to 83°, with overnight lows between 50° and 67°. The average high for September is 75° with an average low of 57°. 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.
