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
54°
39°
15
54°
40°
16
46°
33°
17
42°
29°
18
53°
41°
19
60°
41°
20
61°
40°
21
60°
41°
22
59°
42°
23
54°
40°
24
57°
44°
25
55°
42°
26
51°
42°
27
52°
39°
28
43°
30°
29
43°
32°
30
46°
35°
31
52°
39°
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 42° to 61°, with overnight lows between 29° and 44°. The average high for October is 52° with an average low of 38°. 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.
