S
M
T
W
T
F
S
29
63°
46°
30
63°
47°
1
65°
56°
2
69°
58°
3
70°
57°
4
66°
56°
5
65°
54°
6
65°
52°
7
64°
51°
8
63°
47°
9
64°
46°
10
63°
45°
11
75°
58°
12
75°
47°
13
77°
43°
14
72°
45°
15
62°
43°
16
63°
44°
17
61°
52°
18
64°
54°
19
72°
56°
20
73°
55°
21
74°
54°
22
76°
55°
23
73°
57°
24
76°
44°
25
76°
41°
26
74°
42°
27
61°
49°
28
64°
54°
29
71°
55°
30
72°
54°
31
73°
55°
1
74°
55°
2
74°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in St. Augustine Beach
St. Augustine Beach's December 2026 forecast shows daily high temperatures ranging from 61° to 77°, with overnight lows between 41° and 58°. The average high for December is 69° 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 St. Augustine Beach. See also: January | February | March.
