S
M
T
W
T
F
S
29
83°
73°
30
83°
67°
1
82°
67°
2
77°
70°
3
76°
72°
4
78°
72°
5
80°
71°
6
81°
72°
7
81°
72°
8
80°
71°
9
80°
68°
10
81°
65°
11
80°
68°
12
76°
65°
13
77°
65°
14
74°
68°
15
76°
71°
16
79°
70°
17
Hist. Avg.
78°
68°
18
Hist. Avg.
78°
68°
19
Hist. Avg.
77°
68°
20
Hist. Avg.
77°
68°
21
Hist. Avg.
77°
68°
22
Hist. Avg.
77°
68°
23
Hist. Avg.
77°
67°
24
Hist. Avg.
77°
67°
25
Hist. Avg.
77°
67°
26
Hist. Avg.
77°
67°
27
Hist. Avg.
77°
67°
28
Hist. Avg.
76°
67°
29
Hist. Avg.
76°
66°
30
Hist. Avg.
76°
66°
31
Hist. Avg.
76°
66°
1
Hist. Avg.
76°
66°
2
Hist. Avg.
76°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Key West
Key West's December 2026 forecast shows daily high temperatures ranging from 74° to 83°, with overnight lows between 65° and 73°. The average high for December is 79° with an average low of 69°. 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 Key West. See also: January | February | March.
