S
M
T
W
T
F
S
29
78°
64°
30
74°
62°
1
74°
65°
2
78°
65°
3
79°
64°
4
78°
65°
5
80°
64°
6
80°
65°
7
75°
60°
8
76°
64°
9
80°
57°
10
81°
55°
11
74°
56°
12
73°
57°
13
77°
55°
14
76°
54°
15
72°
54°
16
71°
55°
17
72°
61°
18
75°
62°
19
80°
61°
20
81°
56°
21
79°
56°
22
73°
58°
23
75°
61°
24
79°
59°
25
79°
54°
26
73°
53°
27
72°
54°
28
72°
60°
29
76°
57°
30
78°
60°
31
77°
54°
1
79°
51°
2
76°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Marco Island
Marco Island's December 2026 forecast shows daily high temperatures ranging from 71° to 81°, with overnight lows between 51° and 65°. The average high for December is 76° with an average low of 59°. 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 Marco Island. See also: January | February | March.
