S
M
T
W
T
F
S
28
82°
56°
29
86°
55°
30
87°
63°
1
94°
70°
2
90°
68°
3
87°
68°
4
75°
68°
5
81°
64°
6
78°
64°
7
81°
65°
8
86°
63°
9
88°
65°
10
81°
65°
11
N/A
12
81°
58°
13
84°
68°
14
93°
71°
15
85°
64°
16
83°
57°
17
81°
59°
18
79°
59°
19
80°
62°
20
78°
58°
21
76°
58°
22
76°
60°
23
80°
59°
24
80°
60°
25
79°
58°
26
83°
63°
27
75°
58°
28
76°
59°
29
75°
57°
30
74°
59°
31
76°
60°
1
77°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
July Weather in Port Ontario
Port Ontario's July 2026 forecast shows daily high temperatures ranging from 74° to 93°, with overnight lows between 57° and 71°. The average high for July is 80° with an average low of 60°. 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 Port Ontario. See also: August | September | October.
