S
M
T
W
T
F
S
26
85°
60°
27
86°
60°
28
79°
64°
29
76°
67°
30
77°
64°
31
80°
64°
1
84°
64°
2
84°
68°
3
76°
61°
4
82°
56°
5
84°
58°
6
85°
65°
7
84°
69°
8
81°
67°
9
80°
66°
10
78°
63°
11
79°
60°
12
77°
57°
13
74°
57°
14
74°
49°
15
71°
50°
16
74°
49°
17
75°
64°
18
78°
60°
19
71°
58°
20
71°
55°
21
76°
50°
22
80°
51°
23
77°
60°
24
72°
58°
25
73°
59°
26
78°
58°
27
81°
60°
28
72°
50°
29
74°
46°
30
73°
52°
31
73°
48°
1
77°
56°
2
75°
58°
3
78°
64°
4
75°
60°
5
69°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Saint-Hyacinthe
Saint-Hyacinthe's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August 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 August weather will actually feel in Saint-Hyacinthe. See also: September | October | November.
