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