S
M
T
W
T
F
S
29
56°
38°
30
61°
30°
1
53°
35°
2
56°
34°
3
56°
32°
4
52°
37°
5
56°
44°
6
57°
45°
7
62°
40°
8
63°
31°
9
53°
29°
10
50°
31°
11
53°
41°
12
56°
43°
13
61°
44°
14
63°
45°
15
62°
41°
16
64°
30°
17
62°
32°
18
49°
36°
19
47°
26°
20
58°
22°
21
59°
24°
22
41°
27°
23
45°
27°
24
43°
25°
25
44°
29°
26
50°
38°
27
49°
39°
28
54°
40°
29
57°
32°
30
60°
30°
31
50°
32°
1
51°
25°
2
47°
26°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Duluth
Duluth's December 2026 forecast shows daily high temperatures ranging from 41° to 64°, with overnight lows between 22° and 45°. The average high for December is 54° with an average low of 34°. 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 Duluth. See also: January | February | March.
