S
M
T
W
T
F
S
29
45°
29°
30
43°
30°
1
45°
31°
2
45°
29°
3
44°
26°
4
42°
24°
5
38°
22°
6
35°
25°
7
37°
24°
8
38°
26°
9
38°
16°
10
37°
9°
11
31°
11°
12
23°
12°
13
25°
20°
14
27°
16°
15
32°
18°
16
33°
22°
17
32°
23°
18
36°
22°
19
35°
15°
20
30°
13°
21
26°
11°
22
31°
6°
23
37°
25°
24
33°
12°
25
34°
6°
26
Hist. Avg.
28°
15°
27
Hist. Avg.
28°
15°
28
Hist. Avg.
28°
14°
29
Hist. Avg.
28°
14°
30
Hist. Avg.
27°
14°
31
Hist. Avg.
27°
14°
1
Hist. Avg.
27°
14°
2
Hist. Avg.
27°
13°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Green Bay
Green Bay's December 2026 forecast shows daily high temperatures ranging from 23° to 45°, with overnight lows between 6° and 31°. The average high for December is 35° with an average low of 19°. 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 Green Bay. See also: January | February | March.
