S
M
T
W
T
F
S
29
39°
25°
30
38°
25°
1
33°
24°
2
33°
24°
3
32°
23°
4
36°
23°
5
35°
22°
6
32°
20°
7
27°
12°
8
23°
12°
9
24°
14°
10
33°
21°
11
35°
21°
12
35°
20°
13
32°
20°
14
22°
18°
15
27°
17°
16
32°
17°
17
29°
18°
18
31°
17°
19
30°
13°
20
30°
6°
21
26°
13°
22
24°
13°
23
29°
17°
24
29°
13°
25
31°
7°
26
24°
11°
27
22°
15°
28
27°
13°
29
29°
9°
30
24°
9°
31
26°
3°
1
27°
0°
2
16°
0°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Merrill
Merrill's December 2026 forecast shows daily high temperatures ranging from 16° to 39°, with overnight lows between -0° and 25°. The average high for December is 29° with an average low of 15°. 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 Merrill. See also: January | February | March.
