S
M
T
W
T
F
S
29
84°
77°
30
85°
79°
1
85°
78°
2
86°
78°
3
84°
77°
4
83°
78°
5
83°
78°
6
84°
77°
7
83°
78°
8
84°
78°
9
83°
77°
10
84°
78°
11
83°
78°
12
84°
77°
13
83°
78°
14
83°
78°
15
84°
77°
16
83°
77°
17
83°
76°
18
84°
77°
19
83°
77°
20
83°
76°
21
84°
77°
22
82°
76°
23
83°
77°
24
84°
76°
25
84°
74°
26
86°
75°
27
86°
75°
28
85°
74°
29
85°
75°
30
84°
75°
31
85°
74°
1
85°
75°
2
84°
74°
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 82° to 86°, with overnight lows between 74° and 79°. The average high for December is 84° with an average low of 77°. 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.
