S
M
T
W
T
F
S
30
79°
48°
31
83°
50°
1
82°
50°
2
80°
49°
3
77°
47°
4
79°
48°
5
76°
42°
6
76°
41°
7
77°
42°
8
76°
46°
9
75°
42°
10
74°
41°
11
75°
45°
12
78°
47°
13
81°
41°
14
77°
38°
15
72°
38°
16
71°
37°
17
72°
38°
18
76°
41°
19
76°
41°
20
75°
40°
21
77°
41°
22
78°
44°
23
80°
45°
24
79°
45°
25
77°
44°
26
77°
43°
27
75°
44°
28
75°
44°
29
74°
43°
30
67°
41°
1
68°
42°
2
71°
42°
3
71°
40°
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 67° to 83°, with overnight lows between 37° and 50°. The average high for September is 76° with an average low of 43°. 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.
