S
M
T
W
T
F
S
29
45°
29°
30
42°
26°
1
40°
23°
2
35°
17°
3
30°
12°
4
27°
21°
5
27°
11°
6
34°
8°
7
25°
7°
8
21°
10°
9
24°
9°
10
23°
12°
11
22°
17°
12
26°
21°
13
34°
12°
14
33°
10°
15
23°
6°
16
21°
5°
17
22°
20°
18
32°
18°
19
Hist. Avg.
30°
14°
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 21° to 45°, with overnight lows between 5° and 29°. The average high for December is 29° with an average low of 15°. 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.
