S
M
T
W
T
F
S
30
81°
68°
31
87°
70°
1
93°
73°
2
94°
73°
3
91°
74°
4
91°
75°
5
82°
71°
6
80°
62°
7
81°
58°
8
85°
62°
9
80°
67°
10
77°
57°
11
81°
53°
12
86°
61°
13
73°
51°
14
70°
46°
15
83°
63°
16
75°
63°
17
81°
65°
18
71°
59°
19
70°
63°
20
66°
59°
21
64°
54°
22
64°
53°
23
65°
52°
24
69°
52°
25
69°
54°
26
69°
52°
27
70°
53°
28
72°
52°
29
71°
51°
30
70°
52°
1
69°
51°
2
77°
53°
3
64°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in West Chicago
West Chicago's September 2026 forecast shows daily high temperatures ranging from 64° to 77°, with overnight lows between 51° and 59°. The average high for September is 69° with an average low of 53°. 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 West Chicago. See also: October | November | December.
