S
M
T
W
T
F
S
30
96°
72°
31
94°
69°
1
95°
68°
2
91°
69°
3
86°
66°
4
88°
67°
5
93°
68°
6
93°
67°
7
94°
67°
8
93°
69°
9
90°
70°
10
89°
70°
11
88°
69°
12
87°
69°
13
89°
68°
14
89°
69°
15
86°
68°
16
85°
68°
17
85°
67°
18
87°
67°
19
87°
66°
20
85°
65°
21
89°
66°
22
91°
65°
23
89°
66°
24
89°
66°
25
88°
65°
26
88°
65°
27
84°
64°
28
82°
64°
29
81°
63°
30
84°
58°
1
83°
55°
2
79°
54°
3
78°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Gary City
Gary City's September 2026 forecast shows daily high temperatures ranging from 78° to 96°, with overnight lows between 54° and 72°. The average high for September is 88° 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 Gary City. See also: October | November | December.
