S
M
T
W
T
F
S
29
36°
15°
30
30°
11°
1
28°
14°
2
29°
18°
3
30°
28°
4
37°
21°
5
38°
17°
6
31°
22°
7
34°
13°
8
34°
11°
9
39°
16°
10
37°
13°
11
35°
23°
12
Hist. Avg.
30°
18°
13
Hist. Avg.
30°
18°
14
Hist. Avg.
29°
17°
15
Hist. Avg.
29°
17°
16
Hist. Avg.
29°
17°
17
Hist. Avg.
28°
16°
18
Hist. Avg.
28°
16°
19
Hist. Avg.
28°
16°
20
Hist. Avg.
28°
16°
21
Hist. Avg.
27°
15°
22
Hist. Avg.
27°
15°
23
Hist. Avg.
27°
15°
24
Hist. Avg.
27°
15°
25
Hist. Avg.
27°
14°
26
Hist. Avg.
26°
14°
27
Hist. Avg.
26°
14°
28
Hist. Avg.
26°
14°
29
Hist. Avg.
26°
13°
30
Hist. Avg.
26°
13°
31
Hist. Avg.
25°
13°
1
Hist. Avg.
25°
11°
2
Hist. Avg.
25°
11°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Saint-Hyacinthe
Saint-Hyacinthe's December 2026 forecast shows daily high temperatures ranging from 28° to 39°, with overnight lows between 11° and 28°. The average high for December is 34° with an average low of 17°. 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-Hyacinthe. See also: January | February | March.
