S
M
T
W
T
F
S
28
73°
59°
29
81°
57°
30
73°
57°
1
74°
61°
2
80°
57°
3
74°
55°
4
74°
54°
5
73°
53°
6
72°
53°
7
73°
54°
8
74°
60°
9
74°
61°
10
77°
54°
11
79°
54°
12
77°
59°
13
80°
61°
14
83°
62°
15
76°
54°
16
79°
62°
17
83°
62°
18
77°
61°
19
83°
60°
20
80°
57°
21
82°
60°
22
84°
63°
23
84°
57°
24
80°
53°
25
76°
54°
26
78°
62°
27
83°
63°
28
83°
56°
29
77°
54°
30
76°
56°
31
76°
56°
1
78°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Ottawa
Ottawa's July 2026 forecast shows daily high temperatures ranging from 72° to 84°, with overnight lows between 53° and 63°. The average high for July is 78° 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 Ottawa. See also: August | September | October.
