S
M
T
W
T
F
S
29
90°
79°
30
90°
80°
1
89°
79°
2
90°
80°
3
90°
80°
4
89°
79°
5
88°
79°
6
91°
80°
7
89°
80°
8
91°
79°
9
91°
80°
10
90°
80°
11
91°
79°
12
87°
80°
13
88°
79°
14
90°
77°
15
91°
75°
16
92°
77°
17
92°
77°
18
91°
78°
19
92°
77°
20
92°
79°
21
91°
78°
22
92°
75°
23
92°
76°
24
91°
76°
25
90°
77°
26
92°
76°
27
91°
78°
28
92°
77°
29
90°
78°
30
92°
78°
31
93°
79°
1
93°
78°
2
92°
78°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Jaco
Jaco's December 2026 forecast shows daily high temperatures ranging from 87° to 93°, with overnight lows between 75° and 80°. The average high for December is 91° with an average low of 78°. 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 Jaco. See also: January | February | March.
