S
M
T
W
T
F
S
30
82°
69°
31
94°
73°
1
94°
75°
2
96°
73°
3
94°
74°
4
93°
74°
5
90°
67°
6
81°
59°
7
80°
61°
8
87°
69°
9
85°
63°
10
78°
57°
11
79°
59°
12
82°
64°
13
82°
60°
14
74°
55°
15
80°
59°
16
78°
58°
17
77°
59°
18
76°
54°
19
77°
61°
20
78°
60°
21
75°
59°
22
71°
58°
23
72°
58°
24
78°
57°
25
79°
59°
26
79°
59°
27
78°
58°
28
79°
59°
29
79°
60°
30
78°
59°
1
76°
54°
2
71°
47°
3
64°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Channahon
Channahon's September 2026 forecast shows daily high temperatures ranging from 64° to 90°, with overnight lows between 45° and 69°. The average high for September is 78° with an average low of 59°. 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 Channahon. See also: October | November | December.
