S
M
T
W
T
F
S
26
84°
61°
27
78°
58°
28
74°
56°
29
75°
58°
30
76°
58°
31
75°
56°
1
78°
60°
2
75°
60°
3
80°
59°
4
78°
58°
5
74°
55°
6
74°
59°
7
80°
58°
8
75°
57°
9
74°
58°
10
75°
57°
11
76°
59°
12
79°
59°
13
79°
55°
14
73°
54°
15
73°
54°
16
76°
58°
17
79°
57°
18
80°
58°
19
81°
58°
20
79°
54°
21
71°
52°
22
71°
51°
23
74°
57°
24
74°
53°
25
82°
49°
26
78°
47°
27
70°
46°
28
68°
44°
29
70°
53°
30
71°
54°
31
78°
54°
1
79°
48°
2
78°
46°
3
71°
47°
4
68°
45°
5
67°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Iron Mountain
Iron Mountain's August 2026 forecast shows daily high temperatures ranging from 67° to 84°, with overnight lows between 44° and 61°. The average high for August is 75° with an average low of 54°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Iron Mountain. See also: September | October | November.