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