S
M
T
W
T
F
S
29
32°
19°
30
29°
17°
1
30°
24°
2
38°
30°
3
36°
30°
4
35°
25°
5
33°
22°
6
35°
17°
7
32°
16°
8
36°
16°
9
36°
17°
10
39°
17°
11
39°
15°
12
38°
15°
13
39°
21°
14
36°
30°
15
36°
22°
16
37°
23°
17
31°
29°
18
33°
28°
19
35°
29°
20
35°
24°
21
34°
25°
22
32°
28°
23
35°
18°
24
34°
29°
25
34°
20°
26
36°
9°
27
34°
10°
28
22°
21°
29
28°
17°
30
31°
23°
31
28°
27°
1
37°
27°
2
37°
22°
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 39°, with overnight lows between 9° and 30°. The average high for December is 34° with an average low of 22°. 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.
