S
M
T
W
T
F
S
28
81°
58°
29
86°
59°
30
92°
69°
1
94°
71°
2
91°
71°
3
91°
72°
4
79°
69°
5
79°
66°
6
78°
69°
7
80°
67°
8
87°
64°
9
84°
69°
10
77°
66°
11
78°
62°
12
79°
61°
13
84°
71°
14
88°
66°
15
83°
63°
16
78°
63°
17
79°
62°
18
77°
61°
19
78°
62°
20
82°
61°
21
80°
61°
22
75°
60°
23
74°
56°
24
82°
63°
25
81°
64°
26
82°
65°
27
82°
65°
28
80°
64°
29
81°
64°
30
80°
63°
31
74°
63°
1
74°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Ontario
Ontario's July 2026 forecast shows daily high temperatures ranging from 74° to 88°, with overnight lows between 56° and 71°. The average high for July is 80° with an average low of 63°. 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 Ontario. See also: August | September | October.
