S
M
T
W
T
F
S
29
33°
17°
30
31°
20°
1
32°
28°
2
42°
27°
3
42°
27°
4
40°
25°
5
43°
21°
6
42°
15°
7
32°
13°
8
27°
21°
9
31°
22°
10
37°
20°
11
36°
14°
12
30°
12°
13
27°
11°
14
24°
11°
15
24°
13°
16
25°
16°
17
27°
17°
18
26°
19°
19
29°
20°
20
34°
21°
21
35°
20°
22
35°
19°
23
34°
18°
24
33°
17°
25
27°
15°
26
30°
16°
27
32°
16°
28
30°
15°
29
33°
19°
30
28°
10°
31
22°
16°
1
28°
18°
2
Hist. Avg.
28°
10°
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 22° to 43°, with overnight lows between 10° and 28°. The average high for December is 32° with an average low of 18°. 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.
