S
M
T
W
T
F
S
30
93°
72°
31
96°
73°
1
97°
73°
2
99°
74°
3
100°
76°
4
102°
76°
5
102°
76°
6
97°
74°
7
97°
76°
8
93°
76°
9
96°
73°
10
98°
72°
11
90°
74°
12
93°
74°
13
94°
71°
14
98°
71°
15
98°
74°
16
96°
68°
17
95°
67°
18
95°
72°
19
94°
71°
20
92°
69°
21
89°
68°
22
88°
67°
23
85°
64°
24
82°
60°
25
85°
62°
26
85°
63°
27
87°
64°
28
83°
60°
29
87°
64°
30
86°
65°
1
86°
65°
2
85°
64°
3
87°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Winetka
Winetka's September 2026 forecast shows daily high temperatures ranging from 82° to 98°, with overnight lows between 60° and 74°. The average high for September is 89° with an average low of 66°. 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 Winetka. See also: October | November | December.
