S
M
T
W
T
F
S
29
87°
76°
30
87°
76°
1
86°
75°
2
85°
76°
3
86°
74°
4
85°
75°
5
86°
76°
6
85°
75°
7
87°
76°
8
86°
76°
9
86°
75°
10
85°
76°
11
86°
76°
12
86°
75°
13
85°
76°
14
86°
76°
15
86°
75°
16
84°
74°
17
85°
75°
18
86°
74°
19
85°
75°
20
86°
75°
21
85°
74°
22
87°
75°
23
87°
75°
24
Hist. Avg.
85°
71°
25
Hist. Avg.
85°
71°
26
Hist. Avg.
85°
71°
27
Hist. Avg.
85°
71°
28
Hist. Avg.
85°
71°
29
Hist. Avg.
85°
71°
30
Hist. Avg.
85°
71°
31
Hist. Avg.
84°
70°
1
Hist. Avg.
84°
70°
2
Hist. Avg.
84°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in St John
St John's December 2026 forecast shows daily high temperatures ranging from 84° to 87°, with overnight lows between 74° and 76°. The average high for December is 86° with an average low of 75°. 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.
