S
M
T
W
T
F
S
27
70°
54°
28
64°
53°
29
60°
44°
30
67°
46°
1
65°
58°
2
67°
45°
3
62°
36°
4
63°
36°
5
55°
37°
6
55°
36°
7
62°
43°
8
60°
44°
9
53°
39°
10
55°
32°
11
68°
39°
12
61°
45°
13
45°
41°
14
53°
44°
15
55°
37°
16
47°
39°
17
43°
33°
18
60°
34°
19
65°
41°
20
62°
38°
21
57°
34°
22
59°
34°
23
52°
33°
24
56°
31°
25
63°
31°
26
54°
34°
27
44°
29°
28
46°
30°
29
65°
43°
30
54°
33°
31
49°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Ottawa
Ottawa's October 2026 forecast shows daily high temperatures ranging from 46° to 65°, with overnight lows between 30° and 43°. The average high for October is 54° with an average low of 35°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Ottawa. See also: November | December | January.
