S
M
T
W
T
F
S
30
75°
55°
31
77°
54°
1
76°
54°
2
76°
45°
3
67°
48°
4
69°
53°
5
66°
51°
6
72°
45°
7
69°
43°
8
64°
43°
9
65°
50°
10
68°
52°
11
71°
53°
12
72°
50°
13
72°
44°
14
64°
43°
15
61°
42°
16
62°
42°
17
63°
45°
18
66°
41°
19
63°
38°
20
59°
40°
21
60°
48°
22
64°
45°
23
68°
42°
24
64°
48°
25
67°
48°
26
60°
46°
27
68°
38°
28
63°
37°
29
55°
40°
30
55°
45°
1
59°
40°
2
61°
45°
3
53°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Iron River
Iron River's September 2026 forecast shows daily high temperatures ranging from 53° to 77°, with overnight lows between 33° and 55°. The average high for September is 66° with an average low of 45°. 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 Iron River. See also: October | November | December.
