S
M
T
W
T
F
S
29
34°
21°
30
31°
20°
1
25°
19°
2
28°
20°
3
32°
21°
4
33°
20°
5
30°
18°
6
27°
16°
7
20°
16°
8
23°
17°
9
31°
18°
10
32°
18°
11
31°
17°
12
31°
17°
13
30°
18°
14
19°
11°
15
20°
13°
16
28°
12°
17
27°
11°
18
26°
8°
19
24°
4°
20
19°
3°
21
14°
11°
22
25°
10°
23
26°
9°
24
25°
7°
25
24°
9°
26
21°
9°
27
22°
10°
28
27°
8°
29
26°
8°
30
25°
0°
31
24°
-8°
1
12°
-9°
2
10°
4°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Mountain Iron
Mountain Iron's December 2026 forecast shows daily high temperatures ranging from 10° to 34°, with overnight lows between -9° and 21°. The average high for December is 25° with an average low of 12°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Mountain Iron. See also: January | February | March.
