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