S
M
T
W
T
F
S
30
96°
70°
31
93°
72°
1
97°
71°
2
99°
75°
3
98°
77°
4
97°
74°
5
97°
70°
6
90°
71°
7
100°
70°
8
100°
68°
9
85°
57°
10
86°
66°
11
93°
65°
12
83°
66°
13
83°
68°
14
89°
56°
15
73°
53°
16
75°
57°
17
77°
52°
18
71°
52°
19
74°
51°
20
74°
52°
21
78°
51°
22
83°
57°
23
83°
58°
24
79°
58°
25
71°
57°
26
77°
57°
27
80°
56°
28
77°
56°
29
73°
54°
30
78°
45°
1
65°
44°
2
66°
40°
3
65°
41°
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 65° to 100°, with overnight lows between 40° and 68°. The average high for September is 78° with an average low of 55°. 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.
