S
M
T
W
T
F
S
29
38°
23°
30
40°
30°
1
39°
30°
2
40°
28°
3
39°
22°
4
37°
23°
5
38°
29°
6
36°
16°
7
33°
17°
8
40°
19°
9
40°
20°
10
38°
22°
11
24°
16°
12
25°
24°
13
31°
26°
14
33°
27°
15
35°
26°
16
37°
25°
17
36°
21°
18
34°
16°
19
30°
17°
20
28°
20°
21
29°
18°
22
34°
12°
23
28°
11°
24
22°
22°
25
36°
28°
26
36°
25°
27
35°
19°
28
35°
16°
29
32°
13°
30
28°
12°
31
26°
11°
1
25°
9°
2
22°
12°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Superior
Superior's December 2026 forecast shows daily high temperatures ranging from 22° to 40°, with overnight lows between 9° and 30°. The average high for December is 33° with an average low of 20°. 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 Superior. See also: January | February | March.
