S
M
T
W
T
F
S
28
82°
69°
29
85°
71°
30
90°
66°
1
96°
72°
2
98°
73°
3
101°
74°
4
101°
75°
5
99°
71°
6
97°
72°
7
90°
72°
8
90°
71°
9
93°
73°
10
92°
69°
11
91°
72°
12
82°
70°
13
79°
68°
14
88°
67°
15
91°
64°
16
98°
72°
17
96°
74°
18
93°
73°
19
88°
72°
20
87°
72°
21
87°
70°
22
87°
66°
23
85°
67°
24
79°
65°
25
81°
66°
26
85°
68°
27
84°
68°
28
83°
69°
29
85°
68°
30
85°
69°
31
89°
70°
1
88°
69°
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 79° to 98°, with overnight lows between 65° and 74°. The average high for July is 87° with an average low of 69°. 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.
