S
M
T
W
T
F
S
29
76°
59°
30
77°
56°
1
77°
56°
2
71°
60°
3
76°
48°
4
78°
48°
5
68°
55°
6
67°
57°
7
72°
50°
8
75°
48°
9
71°
47°
10
64°
46°
11
64°
44°
12
63°
45°
13
62°
47°
14
64°
51°
15
64°
55°
16
68°
56°
17
72°
54°
18
72°
47°
19
73°
46°
20
64°
44°
21
63°
44°
22
62°
45°
23
63°
52°
24
65°
45°
25
71°
43°
26
63°
46°
27
62°
54°
28
68°
53°
29
72°
52°
30
Hist. Avg.
67°
49°
31
Hist. Avg.
67°
49°
1
Hist. Avg.
67°
48°
2
Hist. Avg.
67°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in St. Augustine
St. Augustine's December 2026 forecast shows daily high temperatures ranging from 62° to 78°, with overnight lows between 43° and 60°. 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 St. Augustine. See also: January | February | March.
