S
M
T
W
T
F
S
30
47°
36°
1
46°
34°
2
50°
44°
3
49°
42°
4
49°
37°
5
45°
31°
6
55°
43°
7
59°
47°
8
61°
53°
9
60°
47°
10
57°
44°
11
51°
40°
12
53°
48°
13
50°
41°
14
47°
41°
15
52°
41°
16
58°
47°
17
50°
44°
18
58°
44°
19
56°
42°
20
50°
42°
21
52°
45°
22
49°
44°
23
45°
33°
24
41°
31°
25
36°
28°
26
42°
27°
27
40°
29°
28
42°
29°
29
41°
27°
30
42°
32°
31
41°
27°
1
39°
27°
2
38°
28°
3
39°
28°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Longueil-Sainte-Marie
Longueil-Sainte-Marie's December 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for December is ° with an average low of °. 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 Longueil-Sainte-Marie. See also: January | February | March.
