S
M
T
W
T
F
S
28
85°
67°
29
81°
60°
30
81°
57°
1
75°
58°
2
76°
58°
3
82°
56°
4
86°
53°
5
82°
61°
6
92°
60°
7
91°
63°
8
92°
62°
9
91°
68°
10
93°
67°
11
94°
69°
12
95°
69°
13
91°
70°
14
92°
67°
15
88°
72°
16
90°
66°
17
79°
64°
18
84°
60°
19
74°
54°
20
74°
53°
21
78°
54°
22
77°
56°
23
76°
56°
24
81°
55°
25
84°
59°
26
76°
60°
27
80°
59°
28
90°
57°
29
100°
63°
30
84°
67°
31
83°
64°
1
82°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Longueil-Sainte-Marie
Longueil-Sainte-Marie's July 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for July 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 July weather will actually feel in Longueil-Sainte-Marie. See also: August | September | October.