S
M
T
W
T
F
S
30
94°
64°
31
95°
70°
1
98°
70°
2
98°
71°
3
100°
72°
4
100°
73°
5
101°
72°
6
90°
63°
7
90°
62°
8
94°
72°
9
97°
74°
10
84°
61°
11
85°
65°
12
88°
68°
13
92°
67°
14
90°
63°
15
86°
61°
16
88°
64°
17
87°
62°
18
85°
60°
19
81°
57°
20
80°
62°
21
85°
62°
22
81°
61°
23
82°
61°
24
84°
62°
25
84°
63°
26
83°
62°
27
84°
62°
28
83°
61°
29
83°
62°
30
82°
62°
1
79°
56°
2
74°
51°
3
70°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Metropolis
Metropolis's September 2026 forecast shows daily high temperatures ranging from 70° to 97°, with overnight lows between 48° and 74°. The average high for September is 85° with an average low of 62°. 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 Metropolis. See also: October | November | December.