S
M
T
W
T
F
S
29
75°
56°
30
74°
56°
1
74°
52°
2
73°
56°
3
70°
55°
4
72°
51°
5
73°
54°
6
68°
56°
7
72°
56°
8
73°
54°
9
73°
56°
10
72°
45°
11
73°
44°
12
64°
44°
13
61°
45°
14
63°
42°
15
62°
43°
16
60°
47°
17
62°
53°
18
69°
53°
19
68°
52°
20
67°
53°
21
70°
53°
22
71°
55°
23
71°
53°
24
72°
46°
25
72°
49°
26
69°
51°
27
70°
46°
28
72°
43°
29
Hist. Avg.
65°
46°
30
Hist. Avg.
64°
46°
31
Hist. Avg.
64°
45°
1
Hist. Avg.
64°
45°
2
Hist. Avg.
64°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Jacksonville
Jacksonville's December 2026 forecast shows daily high temperatures ranging from 60° to 75°, with overnight lows between 42° and 56°. The average high for December is 70° with an average low of 51°. 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 Jacksonville. See also: January | February | March.
