S
M
T
W
T
F
S
29
84°
75°
30
84°
76°
1
85°
76°
2
85°
75°
3
84°
76°
4
84°
76°
5
83°
75°
6
83°
75°
7
84°
76°
8
83°
75°
9
83°
76°
10
84°
75°
11
83°
76°
12
84°
75°
13
83°
75°
14
83°
74°
15
84°
75°
16
82°
75°
17
83°
74°
18
81°
75°
19
81°
75°
20
83°
74°
21
83°
75°
22
81°
75°
23
82°
74°
24
81°
74°
25
82°
72°
26
84°
73°
27
84°
73°
28
83°
72°
29
84°
73°
30
84°
73°
31
83°
72°
1
84°
73°
2
84°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Fajardo
Fajardo's December 2026 forecast shows daily high temperatures ranging from 81° to 85°, with overnight lows between 72° and 76°. The average high for December is 83° with an average low of 74°. 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 Fajardo. See also: January | February | March.
