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