S
M
T
W
T
F
S
30
83°
64°
31
79°
59°
1
78°
56°
2
76°
55°
3
78°
57°
4
79°
58°
5
83°
59°
6
74°
63°
7
90°
66°
8
86°
69°
9
103°
74°
10
95°
76°
11
87°
70°
12
82°
64°
13
79°
61°
14
79°
60°
15
81°
64°
16
75°
64°
17
76°
61°
18
75°
57°
19
80°
57°
20
78°
59°
21
78°
57°
22
80°
60°
23
89°
63°
24
88°
64°
25
87°
62°
26
93°
62°
27
91°
59°
28
92°
60°
29
91°
59°
30
90°
60°
1
92°
61°
2
86°
56°
3
87°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Oak Park
Oak Park's September 2026 forecast shows daily high temperatures ranging from 78° to 93°, with overnight lows between 56° and 64°. The average high for September is 88° with an average low of 60°. 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 Oak Park. See also: October | November | December.
