S
M
T
W
T
F
S
29
38°
31°
30
41°
33°
1
42°
34°
2
44°
33°
3
43°
32°
4
42°
30°
5
41°
30°
6
38°
29°
7
38°
24°
8
37°
26°
9
36°
30°
10
43°
29°
11
41°
29°
12
38°
28°
13
38°
23°
14
37°
23°
15
35°
20°
16
35°
18°
17
32°
20°
18
30°
27°
19
40°
26°
20
39°
25°
21
36°
23°
22
38°
21°
23
31°
19°
24
30°
18°
25
29°
26°
26
38°
26°
27
27°
18°
28
36°
24°
29
35°
22°
30
Hist. Avg.
33°
20°
31
Hist. Avg.
33°
20°
1
Hist. Avg.
33°
20°
2
Hist. Avg.
32°
20°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in St. John's
St. John's's December 2026 forecast shows daily high temperatures ranging from 27° to 44°, with overnight lows between 18° and 34°. The average high for December is 37° with an average low of 26°. 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's. See also: January | February | March.
