S
M
T
W
T
F
S
29
50°
42°
30
61°
42°
1
57°
44°
2
59°
41°
3
57°
38°
4
51°
34°
5
58°
37°
6
57°
39°
7
48°
35°
8
45°
32°
9
45°
29°
10
46°
26°
11
43°
27°
12
43°
26°
13
44°
26°
14
44°
24°
15
44°
28°
16
45°
33°
17
46°
34°
18
51°
36°
19
54°
25°
20
50°
21°
21
44°
21°
22
40°
23°
23
44°
29°
24
43°
23°
25
43°
22°
26
40°
21°
27
41°
22°
28
41°
20°
29
42°
25°
30
44°
31°
31
52°
25°
1
53°
20°
2
41°
18°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Marion
Marion's December 2026 forecast shows daily high temperatures ranging from 40° to 61°, with overnight lows between 18° and 44°. The average high for December is 48° with an average low of 29°. 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 Marion. See also: January | February | March.
