S
M
T
W
T
F
S
29
78°
69°
30
80°
65°
1
79°
65°
2
74°
66°
3
75°
65°
4
75°
67°
5
74°
70°
6
77°
70°
7
79°
69°
8
79°
66°
9
80°
68°
10
75°
68°
11
76°
67°
12
74°
68°
13
76°
69°
14
79°
65°
15
80°
64°
16
74°
67°
17
75°
67°
18
75°
68°
19
76°
68°
20
76°
67°
21
75°
68°
22
78°
68°
23
79°
67°
24
79°
68°
25
78°
67°
26
78°
67°
27
76°
66°
28
77°
67°
29
76°
65°
30
77°
60°
31
78°
59°
1
70°
61°
2
73°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Big Pine Key
Big Pine Key's December 2026 forecast shows daily high temperatures ranging from 70° to 80°, with overnight lows between 59° and 70°. The average high for December is 77° with an average low of 66°. 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 Big Pine Key. See also: January | February | March.
