S
M
T
W
T
F
S
29
76°
51°
30
75°
46°
1
74°
45°
2
64°
47°
3
63°
55°
4
67°
56°
5
73°
56°
6
74°
55°
7
74°
55°
8
70°
54°
9
75°
45°
10
73°
44°
11
62°
51°
12
63°
45°
13
64°
44°
14
63°
46°
15
63°
53°
16
68°
51°
17
Hist. Avg.
66°
48°
18
Hist. Avg.
66°
47°
19
Hist. Avg.
66°
47°
20
Hist. Avg.
66°
47°
21
Hist. Avg.
65°
47°
22
Hist. Avg.
65°
47°
23
Hist. Avg.
65°
46°
24
Hist. Avg.
65°
46°
25
Hist. Avg.
65°
46°
26
Hist. Avg.
65°
46°
27
Hist. Avg.
65°
46°
28
Hist. Avg.
65°
46°
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 62° to 76°, with overnight lows between 44° and 56°. The average high for December is 69° with an average low of 50°. 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.
