S
M
T
W
T
F
S
30
81°
63°
31
82°
55°
1
82°
55°
2
75°
54°
3
76°
59°
4
78°
63°
5
83°
54°
6
82°
53°
7
74°
53°
8
75°
59°
9
77°
60°
10
77°
58°
11
74°
58°
12
72°
57°
13
73°
51°
14
72°
49°
15
71°
51°
16
71°
54°
17
72°
57°
18
78°
57°
19
78°
58°
20
78°
56°
21
77°
53°
22
74°
55°
23
71°
48°
24
70°
47°
25
67°
47°
26
Hist. Avg.
71°
50°
27
Hist. Avg.
70°
49°
28
Hist. Avg.
70°
49°
29
Hist. Avg.
69°
48°
30
Hist. Avg.
69°
48°
1
Hist. Avg.
68°
48°
2
Hist. Avg.
68°
47°
3
Hist. Avg.
68°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in West Chicago
West Chicago's September 2026 forecast shows daily high temperatures ranging from 67° to 83°, with overnight lows between 47° and 63°. The average high for September is 76° with an average low of 55°. 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.
