S
M
T
W
T
F
S
29
74°
55°
30
76°
55°
1
77°
54°
2
77°
54°
3
75°
51°
4
68°
50°
5
69°
52°
6
68°
52°
7
67°
51°
8
68°
51°
9
66°
52°
10
69°
45°
11
65°
41°
12
64°
41°
13
66°
42°
14
67°
47°
15
68°
53°
16
77°
49°
17
79°
50°
18
73°
52°
19
75°
41°
20
73°
37°
21
67°
39°
22
62°
47°
23
68°
43°
24
79°
38°
25
75°
39°
26
64°
43°
27
65°
41°
28
65°
41°
29
66°
47°
30
68°
49°
31
74°
39°
1
71°
37°
2
64°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Crystal River
Crystal River's December 2026 forecast shows daily high temperatures ranging from 62° to 79°, with overnight lows between 36° and 55°. The average high for December is 70° with an average low of 46°. 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 Crystal River. See also: January | February | March.