S
M
T
W
T
F
S
29
80°
64°
30
81°
61°
1
81°
61°
2
78°
64°
3
80°
53°
4
82°
53°
5
74°
60°
6
72°
61°
7
75°
57°
8
79°
53°
9
78°
53°
10
69°
52°
11
69°
50°
12
70°
50°
13
68°
52°
14
69°
54°
15
69°
59°
16
73°
60°
17
77°
59°
18
76°
56°
19
77°
54°
20
70°
50°
21
69°
49°
22
68°
50°
23
68°
57°
24
72°
51°
25
76°
49°
26
69°
51°
27
67°
59°
28
74°
58°
29
76°
56°
30
72°
57°
31
Hist. Avg.
70°
52°
1
Hist. Avg.
70°
52°
2
Hist. Avg.
70°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Keys
Keys's December 2026 forecast shows daily high temperatures ranging from 67° to 82°, with overnight lows between 49° and 64°. The average high for December is 74° with an average low of 55°. 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 Keys. See also: January | February | March.
