S
M
T
W
T
F
S
29
27°
10°
30
24°
8°
1
25°
15°
2
32°
21°
3
33°
20°
4
31°
19°
5
29°
17°
6
30°
13°
7
28°
12°
8
30°
11°
9
30°
13°
10
33°
12°
11
33°
6°
12
34°
5°
13
31°
10°
14
32°
19°
15
31°
14°
16
33°
10°
17
29°
18°
18
30°
20°
19
33°
19°
20
32°
16°
21
32°
16°
22
28°
19°
23
31°
10°
24
31°
18°
25
30°
10°
26
33°
-1°
27
31°
-2°
28
18°
11°
29
22°
6°
30
25°
12°
31
22°
20°
1
34°
19°
2
34°
12°
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 18° to 34°, with overnight lows between -2° and 21°. The average high for December is 30° with an average low of 13°. 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.
