S
M
T
W
T
F
S
26
80°
63°
27
74°
58°
28
74°
62°
29
75°
60°
30
74°
60°
31
76°
62°
1
75°
62°
2
81°
63°
3
81°
63°
4
80°
62°
5
77°
61°
6
73°
59°
7
73°
59°
8
72°
57°
9
73°
61°
10
73°
55°
11
71°
54°
12
72°
55°
13
75°
61°
14
72°
59°
15
71°
55°
16
71°
54°
17
72°
58°
18
75°
59°
19
72°
61°
20
76°
61°
21
75°
60°
22
71°
59°
23
71°
59°
24
74°
55°
25
75°
57°
26
78°
50°
27
70°
49°
28
68°
50°
29
69°
49°
30
66°
47°
31
67°
49°
1
69°
55°
2
74°
57°
3
69°
59°
4
71°
58°
5
78°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Saint-Constant
Saint-Constant's August 2026 forecast shows daily high temperatures ranging from 66° to 81°, with overnight lows between 47° and 63°. The average high for August is 73° with an average low of 57°. 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-Constant. See also: September | October | November.