S
M
T
W
T
F
S
26
82°
60°
27
82°
61°
28
79°
64°
29
79°
66°
30
75°
64°
31
80°
62°
1
80°
61°
2
80°
67°
3
72°
63°
4
81°
63°
5
83°
59°
6
84°
63°
7
83°
69°
8
84°
68°
9
82°
66°
10
77°
66°
11
80°
63°
12
76°
57°
13
76°
60°
14
74°
56°
15
73°
52°
16
71°
54°
17
77°
58°
18
77°
54°
19
70°
57°
20
75°
53°
21
75°
48°
22
80°
51°
23
74°
58°
24
71°
58°
25
72°
57°
26
76°
57°
27
80°
63°
28
72°
55°
29
72°
54°
30
74°
58°
31
74°
57°
1
73°
56°
2
70°
54°
3
67°
56°
4
68°
55°
5
69°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Yamaska
Yamaska's August 2026 forecast shows daily high temperatures ranging from 67° to 80°, with overnight lows between 54° and 63°. The average high for August is 72° with an average low of 56°. 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 Yamaska. See also: September | October | November.