S
M
T
W
T
F
S
30
93°
62°
31
97°
68°
1
99°
70°
2
99°
72°
3
100°
72°
4
100°
73°
5
103°
73°
6
91°
73°
7
89°
62°
8
94°
58°
9
92°
73°
10
80°
71°
11
80°
71°
12
91°
69°
13
90°
68°
14
87°
63°
15
97°
68°
16
97°
71°
17
98°
74°
18
99°
71°
19
99°
71°
20
96°
69°
21
83°
69°
22
69°
57°
23
72°
55°
24
75°
62°
25
75°
55°
26
78°
57°
27
75°
55°
28
82°
46°
29
86°
48°
30
91°
60°
1
93°
69°
2
72°
59°
3
76°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Carbondale
Carbondale's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Carbondale. See also: October | November | December.
