S
M
T
W
T
F
S
28
70°
58°
29
71°
55°
30
72°
58°
1
75°
60°
2
77°
58°
3
80°
59°
4
74°
55°
5
74°
58°
6
76°
55°
7
75°
55°
8
76°
62°
9
79°
56°
10
75°
54°
11
73°
54°
12
74°
57°
13
76°
59°
14
77°
59°
15
74°
57°
16
75°
55°
17
75°
55°
18
76°
56°
19
79°
57°
20
81°
59°
21
81°
64°
22
80°
64°
23
77°
56°
24
76°
56°
25
76°
62°
26
78°
56°
27
75°
58°
28
76°
56°
29
74°
61°
30
78°
56°
31
75°
58°
1
76°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Montreal / Aéroparc Île Perrot
Montreal / Aéroparc Île Perrot's July 2026 forecast shows daily high temperatures ranging from 70° to 81°, with overnight lows between 54° and 64°. The average high for July is 76° 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 July weather will actually feel in Montreal / Aéroparc Île Perrot. See also: August | September | October.