S
M
T
W
T
F
S
29
40°
28°
30
36°
27°
1
35°
28°
2
37°
27°
3
38°
28°
4
40°
28°
5
38°
27°
6
37°
24°
7
29°
25°
8
34°
25°
9
34°
21°
10
28°
21°
11
33°
24°
12
34°
25°
13
36°
24°
14
37°
23°
15
34°
22°
16
35°
24°
17
37°
20°
18
21°
13°
19
24°
13°
20
24°
20°
21
31°
18°
22
35°
11°
23
33°
16°
24
28°
9°
25
27°
2°
26
23°
16°
27
23°
18°
28
35°
16°
29
34°
2°
30
30°
2°
31
19°
1°
1
21°
-1°
2
24°
-2°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Saint-Eustache
Saint-Eustache's December 2026 forecast shows daily high temperatures ranging from 19° to 40°, with overnight lows between -2° 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 Saint-Eustache. See also: January | February | March.
