S
M
T
W
T
F
S
29
64°
39°
30
64°
37°
1
63°
41°
2
63°
44°
3
62°
42°
4
58°
44°
5
58°
40°
6
57°
37°
7
56°
40°
8
57°
40°
9
59°
41°
10
57°
38°
11
53°
39°
12
57°
40°
13
58°
42°
14
59°
37°
15
57°
36°
16
56°
35°
17
57°
35°
18
51°
34°
19
50°
32°
20
49°
30°
21
50°
31°
22
51°
32°
23
51°
30°
24
50°
30°
25
50°
31°
26
48°
30°
27
49°
29°
28
51°
32°
29
52°
35°
30
53°
34°
31
57°
35°
1
54°
31°
2
52°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Merced
Merced's December 2026 forecast shows daily high temperatures ranging from 48° to 64°, with overnight lows between 29° and 44°. The average high for December is 55° with an average low of 36°. 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 Merced. See also: January | February | March.
