S
M
T
W
T
F
S
30
81°
69°
31
91°
72°
1
91°
78°
2
94°
77°
3
87°
73°
4
86°
74°
5
83°
73°
6
80°
70°
7
78°
68°
8
75°
69°
9
76°
68°
10
77°
68°
11
76°
62°
12
74°
62°
13
74°
65°
14
75°
61°
15
77°
66°
16
78°
66°
17
77°
65°
18
76°
66°
19
78°
66°
20
78°
65°
21
77°
66°
22
77°
65°
23
76°
65°
24
77°
64°
25
76°
65°
26
77°
64°
27
76°
63°
28
75°
63°
29
74°
62°
30
74°
62°
1
73°
61°
2
74°
61°
3
73°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Streeterville
Streeterville's September 2026 forecast shows daily high temperatures ranging from 73° to 94°, with overnight lows between 60° and 78°. The average high for September is 78° 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 Streeterville. See also: October | November | December.
