S
M
T
W
T
F
S
26
55°
29°
27
49°
27°
28
49°
27°
29
48°
25°
30
49°
27°
1
52°
25°
2
50°
29°
3
49°
29°
4
49°
28°
5
51°
28°
6
56°
34°
7
62°
31°
8
53°
30°
9
54°
33°
10
53°
34°
11
55°
37°
12
56°
38°
13
56°
34°
14
55°
34°
15
55°
37°
16
56°
34°
17
63°
42°
18
67°
44°
19
68°
44°
20
69°
42°
21
62°
42°
22
61°
40°
23
64°
42°
24
66°
46°
25
71°
47°
26
72°
46°
27
72°
38°
28
70°
43°
29
70°
46°
30
73°
42°
31
71°
38°
1
63°
35°
2
62°
35°
3
63°
42°
4
67°
49°
5
70°
49°
6
71°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Iron River
Iron River's May 2026 forecast shows daily high temperatures ranging from 48° to 73°, with overnight lows between 25° and 49°. The average high for May is 60° with an average low of 37°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Iron River. See also: June | July | August.