S
M
T
W
T
F
S
30
73°
48°
31
75°
49°
1
76°
48°
2
73°
47°
3
71°
47°
4
71°
44°
5
70°
41°
6
70°
42°
7
71°
44°
8
71°
42°
9
70°
41°
10
69°
45°
11
71°
46°
12
72°
44°
13
74°
38°
14
66°
36°
15
64°
36°
16
66°
38°
17
68°
39°
18
72°
39°
19
73°
41°
20
73°
43°
21
72°
43°
22
73°
44°
23
73°
45°
24
72°
44°
25
71°
44°
26
70°
42°
27
67°
43°
28
67°
40°
29
68°
39°
30
63°
39°
1
64°
40°
2
67°
40°
3
61°
30°
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 61° to 76°, with overnight lows between 30° and 49°. The average high for September is 70° with an average low of 42°. 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.
