S
M
T
W
T
F
S
29
38°
28°
30
40°
25°
1
41°
23°
2
36°
23°
3
35°
24°
4
36°
25°
5
37°
22°
6
37°
22°
7
33°
21°
8
33°
21°
9
34°
20°
10
34°
21°
11
33°
20°
12
32°
10°
13
29°
1°
14
32°
7°
15
17°
11°
16
22°
3°
17
21°
1°
18
16°
3°
19
16°
3°
20
Hist. Avg.
26°
12°
21
Hist. Avg.
26°
11°
22
Hist. Avg.
25°
11°
23
Hist. Avg.
25°
11°
24
Hist. Avg.
25°
10°
25
Hist. Avg.
25°
10°
26
Hist. Avg.
24°
10°
27
Hist. Avg.
24°
10°
28
Hist. Avg.
24°
9°
29
Hist. Avg.
24°
9°
30
Hist. Avg.
24°
9°
31
Hist. Avg.
24°
8°
1
Hist. Avg.
23°
8°
2
Hist. Avg.
23°
8°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Duluth
Duluth's December 2026 forecast shows daily high temperatures ranging from 16° to 41°, with overnight lows between 1° and 28°. The average high for December is 31° with an average low of 16°. 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.
