S
M
T
W
T
F
S
29
49°
34°
30
50°
35°
1
45°
34°
2
44°
34°
3
43°
33°
4
44°
34°
5
52°
33°
6
55°
33°
7
53°
32°
8
53°
31°
9
44°
29°
10
40°
31°
11
51°
16°
12
40°
11°
13
36°
13°
14
35°
23°
15
40°
22°
16
41°
28°
17
41°
22°
18
44°
27°
19
47°
29°
20
51°
23°
21
49°
30°
22
51°
22°
23
52°
14°
24
44°
12°
25
34°
17°
26
38°
22°
27
40°
28°
28
46°
28°
29
53°
32°
30
54°
32°
31
55°
22°
1
55°
15°
2
53°
11°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in St. John
St. John's December 2026 forecast shows daily high temperatures ranging from 34° to 55°, with overnight lows between 11° and 35°. The average high for December is 46° with an average low of 25°. 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. John. See also: January | February | March.
