S
M
T
W
T
F
S
30
71°
42°
31
82°
37°
1
88°
45°
2
66°
46°
3
66°
45°
4
65°
46°
5
70°
47°
6
65°
48°
7
62°
44°
8
72°
44°
9
79°
48°
10
80°
51°
11
77°
49°
12
74°
46°
13
71°
45°
14
77°
46°
15
73°
47°
16
72°
46°
17
77°
42°
18
70°
42°
19
67°
36°
20
68°
45°
21
68°
44°
22
72°
46°
23
71°
41°
24
66°
35°
25
64°
34°
26
65°
38°
27
70°
40°
28
76°
42°
29
75°
43°
30
76°
43°
1
75°
44°
2
75°
44°
3
74°
43°
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 62° to 80°, with overnight lows between 34° and 51°. The average high for September is 72° with an average low of 44°. 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.
