S
M
T
W
T
F
S
29
71°
51°
30
68°
53°
1
69°
45°
2
61°
40°
3
58°
39°
4
58°
44°
5
62°
45°
6
60°
40°
7
56°
39°
8
55°
39°
9
53°
38°
10
54°
37°
11
56°
38°
12
57°
37°
13
58°
38°
14
59°
46°
15
60°
45°
16
68°
41°
17
65°
42°
18
63°
37°
19
58°
34°
20
54°
35°
21
54°
37°
22
56°
37°
23
57°
36°
24
55°
35°
25
55°
36°
26
56°
35°
27
55°
35°
28
56°
37°
29
57°
40°
30
59°
36°
31
59°
34°
1
54°
33°
2
53°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Mandeville
Mandeville's December 2026 forecast shows daily high temperatures ranging from 53° to 71°, with overnight lows between 33° and 53°. The average high for December is 59° with an average low of 39°. 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 Mandeville. See also: January | February | March.