S
M
T
W
T
F
S
30
75°
61°
31
76°
65°
1
75°
67°
2
80°
60°
3
75°
57°
4
73°
58°
5
72°
57°
6
72°
60°
7
78°
62°
8
79°
66°
9
81°
65°
10
80°
58°
11
73°
64°
12
73°
61°
13
75°
56°
14
71°
56°
15
69°
55°
16
70°
54°
17
71°
62°
18
75°
52°
19
70°
56°
20
70°
52°
21
72°
55°
22
70°
60°
23
75°
62°
24
77°
60°
25
72°
61°
26
75°
61°
27
75°
60°
28
77°
58°
29
74°
59°
30
73°
60°
1
75°
57°
2
75°
50°
3
72°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Stony Island
Stony Island's September 2026 forecast shows daily high temperatures ranging from 69° to 81°, with overnight lows between 47° and 67°. The average high for September is 74° with an average low of 59°. 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 Stony Island. See also: October | November | December.
