S
M
T
W
T
F
S
30
96°
70°
31
80°
64°
1
92°
63°
2
92°
69°
3
91°
74°
4
92°
73°
5
94°
71°
6
96°
71°
7
94°
78°
8
99°
78°
9
99°
78°
10
98°
79°
11
96°
75°
12
93°
83°
13
94°
80°
14
93°
76°
15
91°
80°
16
92°
81°
17
95°
80°
18
94°
81°
19
95°
80°
20
92°
71°
21
86°
68°
22
87°
68°
23
89°
70°
24
89°
70°
25
90°
71°
26
94°
75°
27
91°
70°
28
84°
65°
29
84°
67°
30
86°
64°
1
83°
64°
2
84°
65°
3
85°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Superior
Superior's September 2026 forecast shows daily high temperatures ranging from 83° to 99°, with overnight lows between 64° and 83°. The average high for September is 91° with an average low of 73°. 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 Superior. See also: October | November | December.
