S
M
T
W
T
F
S
26
76°
60°
27
80°
59°
28
90°
57°
29
100°
63°
30
84°
67°
31
83°
64°
1
82°
59°
2
89°
58°
3
96°
66°
4
89°
69°
5
81°
66°
6
77°
59°
7
80°
51°
8
87°
55°
9
90°
64°
10
89°
62°
11
88°
61°
12
96°
62°
13
100°
66°
14
100°
65°
15
86°
60°
16
82°
58°
17
77°
59°
18
78°
57°
19
80°
58°
20
79°
58°
21
82°
60°
22
81°
58°
23
80°
59°
24
78°
59°
25
77°
58°
26
76°
58°
27
73°
53°
28
69°
51°
29
69°
52°
30
70°
58°
31
71°
57°
1
68°
55°
2
69°
52°
3
72°
56°
4
73°
56°
5
75°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Longueil-Sainte-Marie
Longueil-Sainte-Marie's August 2026 forecast shows daily high temperatures ranging from 68° to 100°, with overnight lows between 51° and 66°. The average high for August is 79° with an average low of 58°. 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 Longueil-Sainte-Marie. See also: September | October | November.
